Hi Steve, thanks again for advice.
I found the (right click) other settings and checked "disable require admin".
restarted , steam was still asking.
then I noticed that on that 4th? install I let it install to C:\.. program files, so I uninstalled it again,
deleted IF10 folder, Installed with admin rights outside windows folder, run as admin
I had all running as admin but steam, so checked that as well to run as admin.
Now in "Other Settings" submenus, I don't see the "disable require admin" option anymore !
after running 2 times IF10 and fsx I uninstalled IF again and reinstalled , still I don't see the option in
other settings anymore and steam is asking every time for allowance.
Info Steam validate, if someone comes along the same way:
After the steam update IF was not running and I validated steam again, with 8420 files.
After reinstalling Orbx Global there were 815 new steam files left over. (looks like ca 7600 for Global)
I installed also REX4 again but think that was not needed, just run REX4 with new theme,
then were ca 310 files left which steam changed. (some default aircraft, trees, sounds, buildings)
good thing, IF is running, just the steam asking for Ok, I can live with that.
thanks again for help
alf