Stored Sessions Lost after replacing the Mainboard + Processor

A technician just replaced my Mainboard + Processor on my Laptop, when i started the Windows again ALL Stored Sessions were lost.

WinSCP sessions are empty and i cant find the sessions in the registry also. Use 5.x version.

Anyone got an idea. This realy sucks :S

The stored sites cannot be lost by replacing mainboard or processor. There has to be something else. Though it's difficult to guess what.