This is interesting, I have just posted a reply about backups on the thread by J-MAC.
I also renamed my backup to today's date and when I looked in File > backup tool and nothing was there.
I also looked in Program Files jv16 and there in the backup folder was indeed a file called entries.reg
Too late now I have deleted Powertools from my system completely. There must be a problem with renaming backup files or it is related to the problem on the J-MAC thread