Risolto,
avendo ricevuto ancora l'avviso, ho scritto per chiedere spiegazioni e che cmq non avrei pagato.
Ecco la risposta appena arrivata
Don't worry about it. This extension is free. After the trial, you will be converted to Home version and it will still work as before including dials synchronization.
The Pro version has only thumbnails synchronization as a bonus feature.
However I'm working on this add-on for 14 months without salary and I need to pay for renting the cloud-server every month so any donation is very appreciated
Have a nice day