Changelog for update 1.3.2 / GOG-9 (Windows) / GOG-12 (Mac) / GOG-7 (Linux) (added 06 April 2016):

- Fixed multiple musics playing at the same time in custom games
- Several crash fixes


Patch 1.3.1 (06 April 2016):

Misc:
- Local multiplayer game saves now show up in the multiplayer load menu instead of the singleplayer load menu
- Added slight directional effect to sound effects via panning (can be turned off in options)
- Auto-fire is a bit faster now

Technical:
- Replaced the OpenAL sound engine with FMOD
- Updated Mono on Linux/Mac version

Editor features:
- Sound effects can now be .ogg

Changelog for Patch 1.41 (added 04 September 2018):

5 Years ago on this very day, or at least around this day, Hammerwatch was released.

Today we are releasing the 1.4 patch which contains features from the console version released last winter, including the Sorcerer class and twin stick/mouse keyboard support! Several skills have been re-balanced or reworked and a lot of bugs been fixed, we also added a much wanted mana-regen in the combo store. See the list below!

- Added Sorcerer class!
- Added twin-stick controls!
- Replaced Wizards Ice Nova with Fire Nova and Frost Shield with Fire Shield
- Priest beam isn't blocked by other players, now it goes through and heals
- Replaced Warlocks Lifesteal Nova with Summon Gargoyle
- Warlocks Lightning Strike can now hit the same target multiple times for diminishing damage
- Wizard can now move slowly white spraying fire
- The Lich boss in Castle Hammerwatch no longer instantly shoots after teleporting, there is now an animation so the attack can be avoided
- Lives now cost more the more you have
- Added a combo upgrade for regenerating mana
- Updated visuals of characters
- Fixed some small visual issues
- Editor no longer runs extremely slowly with modern NVidia drivers
- Editor now works with Intel graphics cards
- To enable twin stick, enter the control options and set mouse aim, then you will want to rebind the skills to mouse buttons.

Wow, thank you! Hammerwatch just got a little bit more heroic now.

Sadly my single player save file has disappeared following the upgrade. Playing on Mac OSX 10.13.6 :(

I lost mine as well. :( Same OS. I wish there was a warning... I wouldn't have upgraded.