I've crashed multiple times during battles, getting abit frustrating as I have to replay the whole battle, and more often than not it crash.

I dont get any popups other than one telling me DDC stopped working, and this forum doesnt allow me to attach crashdumps, pretty stupid of GOG.

You can email supportdc@larian.com, with the crashdumps, a description of problem and the report.zip file generated by the Dragon Commander support tool.

Even though you are not getting a popup error, it could be related to the issues in the topic Game crashes during RTS and Crash during RTS when i zoom in or out.

Have you tried lowering the graphics settings and texture quality to medium or low to see if that would make a difference?

No I didnt try to lower the settings, I'll try that and if it still crashes send in the crashdump.
Hope you are able to fix it soon. :)

Edit: It did indeed help, took me past the battle I couldnt finish without crashing, looking forward to the fix to it.

Edit 2: Guess I wrote too soon, it just crashed again in a bigger battle.