Others are reporting 2BrightSparks - SyncBack (all editions) as a false positive, but it took me a while to find anything on Google Search today, so I will repeat problem description;
Everything was working OK for me until today (16-Sep-2015 11:00 PM approx) when Avast (free edition) - virus definitions version 150916-2 (program version 10.3.2225) reported 2BrightSparks\SyncBackupFree was a trojan and moved C:\Program Files (x86)\2BrightSparks\SyncBackFree\SynBackFree.exe to Quarantine (Virus Chest) and then recommended a boot time scan. The boot time scan then reported C:\Program Files (x86)\2BrightSparks\SyncBackFree\RemBlankPwd.exe as a virus and also removed this file to Quarantine (Virus Chest).
Avast (free edition) reports both these files as being infected with Win32:Banker-MCG [Trj].
Hello and welcome to the Forum! 
The problem seems to be solved.
DJBone
You can restore all files in the to their place of origin
Restoring files from the Virus Chest
https://www.avast.com/faq.php?article=AVKB21#idt_05
if not left any files then you need to reinstall same
It would appear that Avast Virus Definitions 17-Sep-2015 Version 150917-3 no longer reports a Win32:Banker-MCG [Trj] in 2BrightSparks\SyncBackupFree and I have been able to reinstall the program and operate as normal.
Thank you