Steps to find ur MMR:
1) Open game directory
2) Sort by date change
3) Open .txt files "RollerLogGame_****" where **** is a number
4) Ctrl+F in this file and write mmr or MMR (dosn't matter)
5) Click Enter on ur keyboard
5.1) If this .txt file is correct u'll see ur MMR
5.1.1) Click until a notice appers and look on last value
5.2) If .txt file is not correct close them and search new
That's all