5.0 just uninstalled itself for no reason

I downloaded the latest vs 5 fix and installed it. At the end of the installation the computer rebooted itself and now I can’t find any remains of 5.x on the harddrive. Anyone else have this happen?

It rebooted after it uninstalled the old version of n-track (I know not why). Re-run the installer and the new version will get installed and all will be well again.