Restored files dissapear after reboot

Hi,
we've been having this problem for a while, and it's quite annoying.

So at work we use Paragon Hard disk manager professional 15 on windows 7 to backup disks and create VD arhives. Sometimes we need to copy folders from archive to another disk. Mounting and copying files goes without problem (we copy with Windows Explorer or Total commander).
After the process is finished, we can view files on new disk and edit them without problem. But as soon as the PC is restarted, all the files copied disappear.
Usualy what I do when this happens is either copy through network, or restore archive to a another spare disk, and copy it from there to the true destination. This works.
It's just copying from mounted archive to a disk that... loses the files.

It's quite an annoying bug, since it can take an hour or more to copy files, then when the disk is moved to another PC you find out that not a file was actualy copied and you have to repeat the process (either through net or restored spare disk, both taking even more time then before).

Any ideas?