This thread has gotten way OT.
MLVFS is a service that makes the operating system think you inserted a disk into your computer containing DNG files. Rather than working like a real disk driver that sends file data from a physical disk, MLVFS reads MLV files from some real physical directory (aka folder) on your hard drive that you point it to and converts them to DNG 'on the fly'. This is the same way "mounting a disk image" works (if you don't know what that means, google it).
Once you launch MLVFS a new "drive" should show up on your computer. The drive is "mounted" to the directory you specify. So to get to it, simply navigate to the empty mount directory you selected when launching MLVFS. You'll notice that it is no longer empty, but contains the contents of the "disk".
When you reboot your computer, MLVFS has to shutdown. This is equivalent to physically removing a disk from your computer (you are removing the MLVFS "disk"). If you have a premiere pro project that uses assets (aka files) contained on a "disk", and you start it up without the disk inserted, it will complain that it can't find the files (this is what is happnening to you). To prevent that, you would simply make sure to insert the disk before launching the premiere project. To "insert the disk" that is MLVFS, simply launch MLVFS like you did previously.
TLDR:
All you need to do is launch MLVFS again after you reboot (the same way you did the first time), before you start Premiere Pro. And like I mentioned previously, you can make this automatic by creating a startup script that does it for you.