Often these files are font caches, can safely be deleted, and you can try to stop them from appearing by deleting the font cache. I use OnyX (freeware) to do that. The settings you have for disabled fonts in font book will be reset and you will have to redo that.
The surest and esiest way to prevent this irritating but minor issue is to put the MBP to sleep at night,



and you will never see these files again.
Of course, running without a restart, your memory usage will increase, but running repair disk permissions will clear up any serious memory issues (in addition to fixing any problems caused by bad installer application - are you listening Adobe?), and you will see, in Activity Monitor, almost as much free memory as just after a restart.
So I have almost zero reservations about putting my Mac to sleep compared with turning it off. Of course there are cases where turning it off is best.
In any case, after years of use, and just deleting these "recovered files". I have never noticed any related issues.