I am an old user of jvPT. Until now, I never had problems with new versions. So I bought an installed version 2013.
First impression: SLOW ! e.g. it took more than 10 minutes until the software uninstaller started. After the install the new version - after using a lot of time for seeking errors - told me about PC health and registry health 3%. Incredible, with version 2012 it was 100%. Well I let it "clean", this also (after I decided to make a backup) took much time.
As I looked on the backups, it was not possible - as in ver. 2012 - to highlight a groop of backups. So far, so bad.
For experimental causes I uninstalled and reinstalled the software. Despite the fact that I did not change anything between uninstalling and reinstalling the program found thousends of errors. Well, I let it "clean", and as a result of this, important software as Office programs did not run any more.
Well, B4 trying out new versions I make a backup with an excellent program, and if I decide to go back to the good old version I make a recovery. I can advise this for everyone, since the smart guys of the software companies take care that after an uninstall a lot of information remains on the HD.
After 20 minutes my computer was as it was before and I surely will not install version 2013 in the next time. Maybe they will it improve.