Help, back brush 2.1 from 2.2. Problems

[Guest budong]

Brush a 2.2, I want the brush back to 2.1,

Brush back to 2.1 did not think there are several procedures after the unexpected termination, followed by a blank screen, tried several versions, R4, r5, and both the original brush. Are there other than the terminated program,

Seek expert help!