The website says the VST version "always" requires a license, the DSP does not, however that certain effects are not available unless using the pay version. There is no place on the website that lists what effects on the no-license DSP are NOT usable free, only what its AVAILABLE effects are. Can you clarify that please?
Also the DSP is like a 52 MB DLL, compared to the total 4.3 MB the two superb and free VSTs (not DSPs) I have already use. I'm skeptical that "size matters" here, especially if many of the features are not usable free.