Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
.. if this is the client, as long as you shut-down windows properly (didn't just pull the power, but went to start->shutdown in the windows start menu), then it should be fine.. open up [fah root folder here]\unitinfo.txt.. should tell you how far along its gone through its current work unit, and will read as 0% done if it had reset everything.
is this the first time you have tried starting it since renaming? try renaming it back. then navigate to the folder, execute
./FAH502-Linux.exe
assuming you are using version 5.02. if that doesnt work, i dont know, you may have lost the work unit. but the work is still there, you should be able to continue with it.