A license of Sylfid allows to run the plug-in in full mode, instead of demo mode.
The license will allow you to download and use all future versions of the plug-in.
It also provides you with support.
The license does not use a dongle.
Buying a license of Sylfid-f2 entitles you to a discount on Sylfid-f1.
Use a valid email address, as this address will be used to send your license.