extending license for Kentico 13 trial

Hello:

I downloaded the trial for Kentico 13 but unfortunately I had to pivot to another project to check it out and now the license has expired. I tried to extend the license by downloading Xperience_13_Refresh6_trial but it just seemed to install another Kentico website parallel to the original one and it still said my license was expired. I've now deleted the Kentico folders in wwwroot, the MDF files, the database in LocalDb, and the Kentico directory in \System\ProgramFiles (x86). I want to try the trial again but every time I reinstall it keeps saying my license has expired. How can I get this working? Please let me know if you need more information. Thanks in advance.