How to remove licenses from CMS/SIM?

Hello,

After installing CMS 7.6 from scratch, install my own licenses (valid until December 2015) and upgrading with my new licenses valid until December 2017 we have 18 licenses installed and only 5 of them applied.

That's good and it is working perfectly but we would like to delete the licenses that not apply to our installation (because they're expired or eval ones).

We've deleted the TXT files from C:\Program Files\Altiris\Symantec Installation Manager\Licenses but this doesn't delete them as SIM show 18 licenses installed, so it is something in the database.

How can we clean this?

Thanks!