I found a solution.
I couldn't restore my savefile; however, i could _easily_ modify the new one.

Location of savefile: C:\Users\[username]\AppData\Roaming\MMFApplications\avgn.ini
Here is the file content below the line. I added comments with doubleslash for clarification:
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[]
vsyncoff=0
1=0	  // Assholevania beaten? 1 = true;
2=0	  // Happy Fun Candy Time beaten?
3=0	  // Future Fuckballs 2010 beaten?
4=0	  // Blizzard Of Balls beaten?
5=0	  // Thy Farts Consumed beaten?
6=0       // Dungeons & Dickholes beaten?
7=0       // Beat it&Eat it...beaten?
8=1	  // Boo!Haunted house beaten?
lv=3690   //Lives, 3690 == 29 lives. Every life is worth 123. 29*123=3690
df=1	  //Difficulty, 0=Easy 1=Normal
sp=
cf=
st=1	  //Startlevel beaten?
kl=0	  //Character unlock (Skeleton)
mk=0	  //Character unlock (Mike)
bs=0	  //Character unlock (Bullshit man)
ttt=200   //Total time played in seconds
ttd=4	  //Total deaths
atd=368   //All total deaths, even if save resets, for achievment progress
att=8751  //Number of attacks done ever
tbr=122   //Total beers drinked, for achievment progress
t1u=25	  //Total number of 1ups picked up, for achievment progress