Sorry to hear that man, a bunch of others and myself included used it without a problem. It backed up your files, all you have to do is replace the new files it made with your back up.
I have in the tai config
Adrenaline first
Gamesd second
Spoof third.
And that's working for me
Before that I kept getting like c0-9255-1 or something like that as a error.
Oh weird, ok so Adrenaline never added a line to my config file.
Mine lists;
Gamesd
Spoof
Do I have to manually add this in? This may be the reason it doesn't work.
Just as an FYI, this PS Vita has never been previously activated as I had just recently got it when Sony stopped activating older firmwares.
I'm probably going to just end up restoring the entire PS Vita to get rid of any MLTactivator extra stuff unless of course I can just erase that spoof file or something