silent253,
A corrected data folder has just been sent to you!
The 'main' problem was with your MAME database (xmlout.xml)...which was missing a lot of (needed!) 'description' tag !
You'll just have to build a new MAME database!
The other problems was related to you having created some 'custom' systems...which were not properly detected by the updater!
I have adapted the updater to take those custom systems in account as well as possible!
I remind you (and all other users) that the best - for you and the community - is to come here and either ask support for a new system or share your 'new' system so that it can be added to mGalaxy later on!
Enjoy v6.2