Hello,
There is only like 10 PRO features:
github.com/fastaddons/GroupSpeedDial/wiki/PRO-version-features
The huge majority of features is free.
What exactly are you missing the most? I'm sure this must be some miscommunication :), for example, many users misses the "Edit group" in the main menu so they don't know how to resize their groups.
Best Regards,
Juraj Mäsiar