Strange Files in my Mikrotik Radios

Hello There
I was going to upgrade our radios to 6.4.90. I found there are some strange files there. We have some QRT2, QRT5, NetMetal and … . But these files are in one or two of QRT2 file managers. But when we check other radios, there is only Skin and Pub folders.
What are these? Which ones are removable? How to prevent them to generate again? I read Mikrotik manual and found Autosopout.rif and files like it are generated when there is a problem during boot procedure. What is your idea? Is there any thing wrong?
Mikro.jpg

Auto Backup File
Autosupout is created in failure case
And the rest is from Mikrotik User Manager,


There is nothing strange…

If Usermanager is not needed anymore, you are able to delete all files…

So I can delete Autosopout and Autosopout old and AutoBeforeReset and usermanagement files?
And it doesn’t effect Router’s function and login process?