For those having problems with their previously-working custom dictionaries, I think we would need to see the contents of the Dictionary table in your .kobo/KoboReader.sqlite database to be able to help you troubleshoot your problem. I realise this may not be easy if you're not familiar with using an SQLite browse utility (such as SQLiteSpy).
There are multiple ways to install custom dictionaries. Personally I use the most flexible (but most effort required) method described in detail by surquizu
here and added to by myself and taos in
posts #15,#16,#18 of this thread following problems identified in 4.8.10956. However, I've just tried the 2 easier methods mentioned earlier in this thread (by those having problems since the firmware upgrade) to install:
- a second custom Eng-Eng dictionary - by adding a dicthtml-en-en.zip file to the .kobo/dict directory
- a custom French-German translation dictionary - by adding a dicthtml-fr-de.zip file to the .kobo/dict directory
In each case I needed to add an extra row in the Kobo database's Dictionary table. I'm not sure how you originally did your custom dictionary installs, but I'm wondering whether the necessary entries in this table were removed during your firmware upgrade.
As you can see below, both of these custom dictionaries are successfully looking up the selected word.
I have also attached a screenshot of the relevant rows (the first two) in the Dictionary table to show what a successful entry looks like.