I tried bouth as administrator and not.
All the same negative results.

Thank you for the answer. I did try all the supposed alternatives but without success for v. 4.08. After deinstalling v4.08 I installed version 4.07 without any problems. The v.4.08 had problems to access the effect folder. In the library folder no scenery or texture map were installed. I could run ...

I tried to install the version 4.08 but without success. The files were downloaded, the installer 4.0.74installed without problems. When trying to install the nl2k v4.08 libraries there was problems. The installer gave a message not being able to access some files in FSX. The libraries showed up in ...