Hello forum,
After we received no support.
I found a short-term solution to our problem.
It is hard, but it helps until a software update solves the problem.
You create a previous WIN version with a USB stick, e.g. 8.1
with WinToUSB. Start the newly created system via the BIOS.
There you can quickly install the Flirc software and program the FLIRC-SE.
The program is maintained !!!
After changing the boot menu to your Win 10 system in the BIOS again.
Voila, the new programming is still there.
CU
Michael