I think I have been doing this wrong when setting up NVIDIA Inspector.  I go to the drop down menu where FSX is located, make changes if need be and then just press "apply changes".  Is this all I have to do?  I saw a video on youtube saying you need to "add application to current profile" and then link the fsx.exe file.

 

Is this true, will it not work by just pressing the "apply changes".  Thanks!

 

If you have FSX installed in the default location then the way you describe sounds 100% correct. I guess the advice to create a new profile would apply if FSX was not installed in the location that NvidiaInspector was expecting. If the changes you are making are not making a noticeable difference then I guess the easiest way to confirm changes are being applied would be to set frame rates to unlimited in FSX and use the frame rate limiter in NvidiaInspector then check if your frame rates are capped in FSX using shift+z a couple of times to bring up the FPS info.