I really appreciate MTU.Community members like Nreel! 
That's what this Community is all about... helping each other.
I'm not MTUSUPPORT, but I do believe Nreel is on the mark here. The flexibility to create your Songs Database anywhere was a NIGHTMARE!
Folks had them everywhere. One day, I was working with one of our programmers on a new feature that added songs to the Songs Database. The code looked right... the KMA file appeared in the folder... but not in Songs Database?
Finally, I asked him to do a Windows Explorer search for Songs.mbd... and about 8 showed up!
We then checked, and he was somehow not even using the current Songs Database. We had just wasted 30+ minutes and lots of scratches on our head.
I consulted MTUSUPPORT, and he reported MANY users having problems with the Songs.mdb being in the "wrong" place.
We stripped the flexibility, forcing Songs.mdb to ALWAYS be where Hoster could find it... without pilot error... and ended a lot of confusion.
Your post here indicates we maybe, could have made it easier to upgrade to this version.
In Hoster 3.100 we are now working on, we had to add a new TYPE field into the Songs.mdb to support importing or converting .cdg, .bin, MP3+G and .zip files into .kma's and adding them to the Songs.mdb. Thus... we have to force a rebuild of the Songs.mbd. We hope we have done this transparent to everyone.
Also... in the Import screen, if you change the
Save to Folder where your KMA files go, we now automatically add that folder path to the Build Songs Database
Song source folder list window. That way, rebuilding will always pick up the folders your KMA's are in.
Let us know here if you still aren't using 3.006, and what you are seeing. I'd suggest you do a search for "Songs.mdb" and delete all of them. Then, in the Build Songs Database, make sure all folders are added that hold your KMA files. Then, click the Build Songs Database button in its dialog box to rebuild Songs.mdb.