SynthEdit Licensing

Hello,

I'm fairly new to SynthEdit and I have downloaded the different versions of it just to try it out and see how it works.

I see there is buy tab on the main page however I cannot find any explanation as to the benefits of purchasing the full version. From what I've seen so far the downloaded versions I have seem to already be fully functional. Could someone explain the benefits if any or is it just try before you buy?

Thanks

Philip