latest version locking up laptop

version SmartFTP 4.0.1072.0 locks up my laptop as soon as I upload one file. Mouse freezes, cntrl, alt , delete does not work, have to pull power cord, and the battery out of the laptop to get pc running again. There were never any issues with previous versions, this just started happening after I upgraded to smartFTP latest version for 64bit windows 7 Premium.