Can I enter my Lightroom 6 serial number into my expired trial version of Lightroom CC? [was: trial version to desktop version]

Hi Adobe Community,

Just finished my trial of Adobe Lightroom CC in my PC (Windows 7).

Decided to buy the desktop version of Lightroom 6.

Already downloaded and was about hit the install but thought I'd post my question here first.

Do I need to uninstall the Lightroom CC (Trial) first on the PC?

As the trial period has finished I have been prompted to type in a code, which I now have, not sure if that can be used for the trial Lightroom CC I have on my PC now.

I have a fair few photos in the catalogue atm and would not want to loose any data.

Advice before I hit the install button and mess everything up?

Cheers

Nick