Patch 2.01b for the Tower defense/RPG hybrid Defender's Quest has been released:

Changelog

(Just pushed 2.0.1b live for Windows, I'm working on Mac/Linux builds as we speak, they'll go up tomorrow)

• Russian/foreign-language characters in your user directory should no longer make the game explode
• Fix null error when using "use cheapest technique" targeting error
• Fix "scale must be >= 0" error
• Fix fail penalty actually being a bonus
• Removed F2 instavictory cheat key accidentally left in
• Fix bug where characters not yet found in NG+ mode would prevent them from being usable in regular game once NG+ was started
• Updated the credits with DX contributors (more to come)
• File Dialogs should not crash anymore
• The correct save path should be respected
• Locale choice should be saved
• Fullscreen options should work much better now
• You can now pick any window size up to and including your fullscreen resolution (this means the biggest window might be slightly too big, but it seemed confusing to some people why they couldn't pick 1080p if they had a 1080p screen)
• Fixed crash in party screen for users playing in ultra widescreen
• Fixed lots of crash bugs

NOT yet fixed, but coming soon in patch #2, Version 2.0.2x:

• Better 4K resolution support (the "transparent scrolls" bug)
• Bugged / fake achievements
• Slow End / Slow Start books causing monsters to be pushed off the map
• Enemies "cheat" on bonus levels in original art mode + resolutions higher than 800x600
• Performance issue for some users (most users say performance is good)
• (And a few others)

The biggest bug we have yet to address is the fact that in higher resolutions the texture memory runs out and scroll menu backgrounds become transparent, making menu text hard to read. The current workaround is to play the game in a lower-resolution window until patch 2.0.2x is out.