Just a guess here but...seems to me when one authorized an AITB library it had to be done on the machine in question (and then that specific file gets uploaded and an authorization generated). So based on that I'm betting that the .SER has some kind of identification (of that specific machine or drive) which no longer matches.
You might not be out of luck, though, the AITB My Account section seems to be up and running. I have no idea if it will generate a new authorization but it's worth a try.
when you change harddrives, the ser-number changes. so you have to authorize it again. the useraccounts of aitb are still accessible, so it should not be a problem. send an email to aitb and they will help you. best, mathias
system 1: windows 8 32 bit - samplitude prox/x3, tracktion6/7, reaper system 2: mac osx yosemite - reaper(32+64bit), tracktion6/7(32+64bit)
both systems on: macbook pro (late 2009), core 2 duo 3,06 ghz, 4 gb ram, graphic: nvidia geforce 9600M GT 512 MB
Pretty sure you are SOL, with AITB at this point. My APeQ, EAR and Mammoth have been out of commission for the Server Mac version I upgraded to, but when I rolled back to 32bit Nebula (non-server), my AITB libraries still came up bad, even though they are on the same drive they've always been.
I was able to login to my account at AITB, upload the existing .SER files and download the new .AUT files to the nebulatemprepository I have set...
but no change.
I see the libraries in the plugin, but just get init. Rebooted, restarted, etc. No AITB except for the libraries I didn't get around to authorizing because they already had long been working fine (Doc Fear, etc).
Bummed because I picked up all the Verb and EAR libs to swim around in when I had time. Gone.
If you are using the original ser files, they will not work because you are merely getting an aut file to unlock your old set-up, which does not work. Try moving the ser files and old aut files(for the libraries not working) to a non-Nebula related location, and load each library to generate a new ser file. Upload those to your account and try those aut files..