Version 1.0.73 - 2022-04-03 Collection assignment now uses a 3d potential #zotero_key Custom Column value in addition to the Calibre Identifiers zkey and zkey_file. This 3d source is rarely useful, but compensates for "drift" between Zotero and Calibre for items originally imported from a Zotero exported .csv file.
Note that the most recent version of ZMI uses the Qt6-compliant Calibre 6.0.0 that will be released officially in the near future. The current release candidate and stable beta is available at:
https://download.calibre-ebook.com/betas/
For Old & Deprecated versions of ZMI, see:
https://www.mobileread.com/forums/sh...d.php?t=327472 Do not post any issues or questions about old and deprecated versions of ZMI, especially related to the ZMI Comparison Tab that uses Zotero Collections. They are totally unsupported.
DaltonST