It took me several months to complete, but finally there it is - an IMAP4 update. I've released it for Polish users back in the July, improving my IMAP implementation and fixing older bugs since then. I haven't totally forgot about international users and translation was updated as the UI was modified/extended, I just had no time (or courage...) to release it yet. Now, I did it and that should fix things for those who experience mysterious "format" errors when attempting to use new application core along with old translation.
Apart from new support for IMAP4 protocol, there were a lot of other changes. Unfortunately I haven't updated the changelog in the same manner as I did with the translation file - and because there were quite a few changes since original July release, I decided to postpone that by a day or two. You may always use online translation service - this should give you a general overview on what has been changed/fixed/added/optimized.
There's no "big" or anyway "final" release yet - if you're already an HCM user, just grab the newest daily builds of translation file (langs.7z), applicaiton core (hcm.exe) and support library (hcm_extra.dll) (and maybe a brand new JpegFast library) and unpack them to your HCM installation directory. Note that you will be unable to revert to previous versions of you upgrade. It's always a good idea to make a backup copy of your data - not only when upgrading.