removing previous license

Just wanted to clarify something - I have Cubase 7.5. My particular issue is actually with HALion 5, the trial version. I just want to know how to remove a license. As when I try to activate the trial and I’m getting a message that says something along the lines of “you can’t have two licenses of the same type”. I had assumed that it may have to do with the HALion Symphonic Orchestra trial, which doesn’t expire for another couple of weeks, and though that removing that license may fix the issue.

Thanks,
Tee