^ thats it.
The guide to reset your rank/stats and stuff manually. After the reset, you can use a trainer to hack to the rank you was before you hacked to lv70 everything unlocked.
To explain step 2 more detailed:
it says some ''numbered folder/some numbered folder''
On the first one, if you see more than one, that means you used/have multiple steam accounts, you need to find out which one is the one you want to reset.
The 2nd must be always 10190
Next time, don't imediatly post things in the help section. The general section is full of guides. There are also guide compilation threads to find things easier.