GUI crashes when I try to register

Hello,
I am having problems when installing 5.1.822 of the free version. The installation goes fine until I click the “Register”-button then the GUI crashes and I have to start the GUI again. Windows complains that the memory could not be read.
What can I do? Use an earlier version?

Hirudoid

5.1.822 is a beta version, are you aware of this?

There is a thread in the BETA section of the forum

5.1.822 is crashing when try to register through GUI