To rebuild your database: click
Tools menu,
Build Songs Database command.
However... if you imported songs on a different computer and copied them to your show computer hard drive, then you want to merge your KMA files. This will add the files copied to the hard drive(versus imported into the Songs Database),
AND automatically renumber any duplicate BookIDs that may exist, which is very likely.
To merge songs into your database: click
Tools menu,
Merge KMA Files Command
Both commands are described in the manual, and I recommend you read it.
