My save files! They fucking did it didnt they? My save files dont work anymore because the once I have are tier4 and the versions we are getting now are the public versions... They are just not compatible..!
I put way too many hours into this little game to start over so soon. I just cant. I put around 40+ hours in grinding and looting and whatnot, because it is a genuinely fun survival game.
I guess I will have to wait for the finished version in around 5-10 years...
I don't think there's any reason your saves from the tier 4 version won't work on the normal version. The only things tier 4 adds are the debug menu, more options in the character creator, and the ability to start the quest that gives you the tier 2 NPC.
When is the last time you played? If it's been a really long time then it might be a version incompatibility. I think back after version 0.8.3.2 or something they removed the code to convert saves from 0.8.2 versions, so you would need to find an early 0.8.3 version to upgrade your save before running on the latest
Edit:
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's the changelog for the last version that had the save upgrading. See the note at the top of the page