Solved
My sister created a new account today but unfortunately she did not receive any confirmation email so she can not sign in.
Followed all instructions, waited 15 minutes, checked spam, asked for a new email. Nothing works. Any help appreciated
Windows 7, deskop (offline version) 6.0.465.0
Files:
geogebra regist...
The same problem 
https://help.geogebra.org/t...
Please try now
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