Problems with backups and moving library

Hello, 

I can't believe it is so hard to backup and restore rekordbox library... 

I am using windows 10 on both PCs and the most recent rekordbox version.

All  I wanted was to go away from my desktop PC (original rekordbox collection) and to do some stuff on rekordbox away from home. Then I have backed up the contents from rekordbox on my stacionary PC and restored on my laptop, then after finished on laptop all I wanted is to to do the same the other way round and have updated library on my stationary PC. And then here goes the shitstorm... 

Backup is failing at the very end with error message "Failed to restore the collection"

Then i was trying to change master database location and put it on an HDD which I used for backup moving. It does load nicely but ALL files are missing with wrong destination and then I am not able to use relocate files function using just the main rekordbox_bak folder? Can someone answer why this function works only for single files? Why oh why can't it be very simple to just move the library nicely.... ?? 

The problem with changing master database collection is that it pulls the original files destination from the content location and it does not update it on the new master location, and then of course you can't just select location for all the files, only single files? Please someone explain why this must be so hard?