Do you have any idea why my profile crashes? So many times at the startup it's writes that there were an error on my profile and it's needed to create a new savefile - so all my progressions, setups, etc. are lost! It's very frustrating... Do you have any idea what to do?

make a backup every day. You can use a program to automate this

There are at least two things that can cause this.

 

1.  You're not waiting for the auto-save function to complete when exiting the game.  That's the spinning reel-to-reel tape machine that pops up on the right side of the screen.  Every time you finish a song, go back to the main menu, and do various other things in the game it will auto-save.  Make sure you're letting that finish before quitting the game.

 

 

2.  You have a bad custom in your dlc folder.

 

 

Check this thread out and see if you have anything on the list:

http://customsforge.com/topic/4863-list-of-crashers-jammers-dead-toners-and-misc-problems/