The 7 Epub files we need to merge as well as the text basis for the metadata file and the cover page we use are all in this folder:
https://www.asa3.org/ASA/Epub/
I did download the v2.17 of the plugin but I don't know how to install it in Calibre. How do I do that? I presume I remove v3.1 but how do I get it to install the older version? I'm just trying to see if the version makes a difference. The desktops have merged files exactly like the ones in the above folder for about 5 years. But after updating to the latest versions, we get the failure response I mentioned.b
Randy