Infinite Loop License Code

#1
I had installed ProgDVB 5.15.01.
It ran good.

Now i wanted to install 5.15.06.
I deinstalled 5.15.01 and installed 5.15.06.
Then 5.15.06 wanted the License-Code.
I gave it the License-Code and Prog said "Success - Please restart ProgDVB"

Then I reastarted, but Prog wanted the License-Code again.
Now it is an infinite-loop.

How can i repair this Infinite-Loop.

Looking forward to your answers.

Sarge
ProgDVB 6.48.4