[nhedgehog]

Tried it though I normally don't use collections just series.
Here some hopefully constructive feedback:

1) First start, my firewall reported that it was trying to connect to some google adress, is this necessary?
2) My system language is neither English nor Russian, so I landed in the Russisan interface with the Russian database opening error messages, changing the text in locale.txt from ru to en solved that.
3) I was a little confused about the interface. Tried adding a new shelf but nothing happened. Filtering by tag, name and series worked though series has some strange selection entries upfront:

{"category_sort": "value", "#value#": null, "name": "more_series", "colnum": 1, "datatype": "text", "search_terms": ["#more_series"], "rec_index": 24, "column": "value", "label": "more_series", "is_csp": false, "is_custom": true, "#extra#": null, "is_category": true, "is_multiple2": {}, "link_column": "value", "display": {"use_decorations": 0}, "is_editable": true, "is_multiple": null, "table": "custom_column_1", "kind": "field"}
{"datatype": "text", "column": "value", "rec_index": 24, "search_terms": ["#more_series"], "is_csp": false, "table": "custom_column_1", "is_multiple": null, "#value#": null, "is_multiple2": {}, "colnum": 1, "category_sort": "value", "name": "more_series", "is_editable": true, "display": {"use_decorations": 0}, "link_column": "value", "label": "more_series", "is_category": true, "#extra#": null, "is_custom": true, "kind": "field"}
{"datatype": "text", "display": {"use_decorations": 0}, "link_column": "value", "column": "value", "kind": "field", "is_custom": true, "rec_index": 24, "search_terms": ["#more_series"], "#extra#": null, "is_multiple2": {}, "colnum": 1, "table": "custom_column_1", "is_category": true, "is_editable": true, "name": "more_series", "is_multiple": null, "is_csp": false, "label": "more_series", "#value#": null, "category_sort": "value"}
{"display": {"use_decorations": 0}, "datatype": "text", "#value#": null, "name": "more_series", "is_custom": true, "colnum": 1, "is_csp": false, "is_multiple": null, "kind": "field", "is_multiple2": {}, "category_sort": "value", "table": "custom_column_1", "is_category": true, "link_column": "value", "is_editable": true, "column": "value", "label": "more_series", "rec_index": 24, "#extra#": null, "search_terms": ["#more_series"]}
{"is_custom": true, "rec_index": 24, "link_column": "value", "label": "more_series", "is_editable": true, "display": {"use_decorations": 0}, "datatype": "text", "name": "more_series", "#extra#": null, "column": "value", "is_csp": false, "#value#": null, "kind": "field", "category_sort": "value", "search_terms": ["#more_series"], "colnum": 1, "is_multiple": null, "is_multiple2": {}, "is_category": true, "table": "custom_column_1"}
{"is_editable": true, "is_multiple2": {}, "table": "custom_column_1", "#value#": null, "label": "more_series", "is_multiple": null, "is_custom": true, "rec_index": 24, "datatype": "text", "column": "value", "display": {"use_decorations": 0}, "kind": "field", "is_csp": false, "category_sort": "value", "#extra#": null, "link_column": "value", "name": "more_series", "colnum": 1, "is_category": true, "search_terms": ["#more_series"]}
{"is_editable": true, "kind": "field", "table": "custom_column_1", "is_category": true, "link_column": "value", "#extra#": null, "search_terms": ["#more_series"], "name": "more_series", "label": "more_series", "rec_index": 24, "is_custom": true, "display": {"use_decorations": 0}, "datatype": "text", "category_sort": "value", "column": "value", "is_multiple2": {}, "#value#": null, "is_csp": false, "is_multiple": null, "colnum": 1}
{"is_multiple": null, "is_category": true, "#value#": null, "is_custom": true, "table": "custom_column_1", "column": "value", "rec_index": 24, "is_multiple2": {}, "name": "more_series", "link_column": "value", "is_csp": false, "colnum": 1, "#extra#": null, "search_terms": ["#more_series"], "display": {"use_decorations": 0}, "category_sort": "value", "datatype": "text", "kind": "field", "label": "more_series", "is_editable": true}
{"is_multiple": null, "name": "more_series", "datatype": "text", "#extra#": null, "category_sort": "value", "#value#": null, "is_category": true, "label": "more_series", "rec_index": 24, "is_multiple2": {}, "kind": "field", "search_terms": ["#more_series"], "table": "custom_column_1", "is_csp": false, "colnum": 1, "display": {"use_decorations": 0}, "is_custom": true, "column": "value", "is_editable": true, "link_column": "value"}
{"kind": "field", "#value#": null, "table": "custom_column_1", "is_multiple": null, "is_custom": true, "is_category": true, "label": "more_series", "link_column": "value", "datatype": "text", "column": "value", "display": {"use_decorations": 0}, "search_terms": ["#more_series"], "is_multiple2": {}, "category_sort": "value", "#extra#": null, "colnum": 1, "name": "more_series", "is_csp": false, "is_editable": true, "rec_index": 24}
{"label": "more_series", "column": "value", "is_editable": true, "is_custom": true, "rec_index": 24, "category_sort": "value", "name": "more_series", "search_terms": ["#more_series"], "is_multiple2": {}, "kind": "field", "is_csp": false, "link_column": "value", "is_category": true, "#value#": null, "datatype": "text", "colnum": 1, "display": {"use_decorations": 0}, "is_multiple": null, "table": "custom_column_1", "#extra#": null}
{"search_terms": ["#more_series"], "category_sort": "value", "is_multiple": null, "name": "more_series", "datatype": "text", "is_category": true, "label": "more_series", "column": "value", "#value#": null, "table": "custom_column_1", "#extra#": null, "is_csp": false, "colnum": 1, "is_multiple2": {}, "kind": "field", "display": {"use_decorations": 0}, "is_editable": true, "link_column": "value", "rec_index": 24, "is_custom": true}
{"search_terms": ["#more_series"], "is_editable": true, "table": "custom_column_1", "is_category": true, "category_sort": "value", "colnum": 1, "label": "more_series", "rec_index": 24, "name": "more_series", "column": "value", "is_custom": true, "kind": "field", "is_csp": false, "display": {"use_decorations": 0}, "datatype": "text", "is_multiple2": {}, "#extra#": null, "is_multiple": null, "#value#": null, "link_column": "value"}
{"search_terms": ["#more_series"], "table": "custom_column_1", "colnum": 1, "#extra#": null, "display": {"use_decorations": 0}, "is_category": true, "link_column": "value", "column": "value", "is_csp": false, "#value#": null, "category_sort": "value", "is_multiple": null, "is_multiple2": {}, "datatype": "text", "name": "more_series", "is_editable": true, "kind": "field", "label": "more_series", "rec_index": 24, "is_custom": true}

4) After the filtering and selecting "add to shelf", there should be an option to create a new shelf, even if no shelf is existing. I couldn't do much with it without this option.
5) I found no possibility to change the series entry, I guess till now this app is only working with shelfs.
6) After disconnecting the device from the computer, I got a blank screen, which didn't go away. Had to force the device to switch off before the Main Screen was visible again.
7) After creating one shelf on my pocketbook, suddenly creating new shelfs worked in the app. But something strange happened: I filtered per author, selected all books (via the "select all books" button) and selected add to shelf, assuming that all the books in the filtered selection will be added to the shelf. Strange enough not only the filtered but all my books were added to the shelf. If the books were manually selected, only those were added to the shelf. But still I think what I wrote on 4) should be applied.

All the shelf changes I made with this app were available after a restart (see 6) on the device!
My devices PB 740 (InkPad 3 FW 6.1.1069) & win7 64bit.

All in all in my opinion a very useful app which only needs some corrections. Thank you.