Great, thanks for those logs Kezooz, and yes, most oddly, NO accounts folders seem to be working correctly, all accounts that are working (eg, checking mail without error) are giving the same sort of errors, eg:
06-09-2023 07:58:49.741 Error Failed to select folder 34 mw4 NO 34 doesn't exist.
06-09-2023 07:58:42.137 Error Failed to select folder 15 mw4 NO 15 doesn't exist.
06-09-2023 07:58:18.951 Error Failed to select folder 25 mw4 NO 25 doesn't exist.
06-09-2023 07:58:03.097 Error Failed to select folder 71 mw5 NO 71 doesn't exist.
06-09-2023 07:57:27.922 Info S: mw4 NO [NONEXISTENT] Unknown Mailbox: 43 (Failure)
(Additionally, 2 of your icloud accounts are failing to logon at all, (Evie and Todorka) however that looks like a bad password issue there....)
Each of these lines are from different accounts you have setup in MWPro, so ALL seem to be failing to show folders for some unknown reason....
I'd say that the accounts file itself may be corrupt somehow, you may need to delete it and start setting up accounts again unfortunately...
I'd advise you backup first via File>>Export, save the resulting file somewhere safe.
Also make a copy of the files under Help>>User Files that way you can re-insert all or only some of these later if need be. (the export option saves all these files to one file).
Note also, as you have several gmail accounts, you are likely using app passwords for these, so make a note of each accounts password so you can paste it in later to save you having to re-create new app passwords....
Then uninstall MWpro and click NO to save your user data.
Browse to the following folders (IF there) and delete actual "Firetrust" folders:
C:\Program Files\Firetrust
C:\Program Files (x86)\FireTrust
C:\ProgramData\Firetrust
(The last folder is actually hidden, so you may need to enable Windows to show hidden files and folders under,
the Windows Control Panel, Folder Options>>View Tab>>Select, Show hidden files and folders.)
Then install MWPro from here:
http://www.firetrust.com/products/mailw ... o/download
Setup one account at a time ensuring it is working correctly and showing folders before moving onto the next.