I have an old license, how can I install the NEW version trail version?

Hello,
a functionality in my version of BTT has stopped working (moving windows programs in different virtual desktop, I can still move Macos programs at will). I tried to install the latest BTT version, but I am told my trial period has expired. How can I try the new BTT before I buy it? (and no, I am not planning to do a complete reinstall of Macos).
Thank you in advance.
Renato

Unfortunately that is not possible.

can you please at least tell me whether with the latest BTT you can move windows program (using coherence) in different desktops? as I said, it used to work.
Thanks for helping.
Renato