Change "combat style" of saved game

[Ekkoria]

So I created a co-op game with my friend and accidentally set the combat style to epic instead of normal. Two and a half hours later we finally figured out why the heck everything was so slow. We don't really want to start a new game.. is there any way for me to change this option mid-game?

[Radiant Phoenix]

You might be able to activate 'uncompressed saves', save it, and edit the save.

[Toranth]

You can, it seems.

It looks like you need to change it in two places.  First, on the third line of the save file, you'll see something like this:

46|1,0,30,2,6,1,1,0,1,1,1,1,1,1,1,1,0,0,1,22,-1,False,1-2-3-4-5-6-7-8-9,,,,1,2,1,0,1,1,3-1-15-1,,,0,0,0,0,0,1,1,

The red number is the indicator of game speed.
Epic = 0
Normal = 1
Blitz = 2

Once you adjusted that one, there's what seems to be a repeat of that section - and this second part seems more important.  Go to the very LAST line of the file, and you'll see something like this:

23|2662|12|1|-1|-1|2662|0|218888888|A|1,0,30,2,6,1,1,0,1,1,1,1,1,1,1,1,0,0,1,22,-1,False,1-2-3-4-5-6-7-8-9,,,,1,2,1,0,1,1,3-1-15-1,,,0,0,0,0,0,1,1,|T1

Again, the highlighted number is the game speed number.

I tried this change a few times, and it worked for the few minutes I played.  It worked both for new games, and games already several hours in progress.
HOWEVER, I only played a few minutes.  There may be complications or unexpected side effects from messing around with the save file.  So I recommend you make a back-up first, and don't be surprised if strange things happen later on.  Messing with time machines rarely has good results.