Hi Pierre

In Vista/Win7/Win8/Win8.1, it is best to do the following:

1. Install the csr001_1100.exe using the Run as administrator option by right clicking on the file and selecting Run as administrator from the the list appears.
2. Make sure you run the WXR Editor using the Run as administrator by right clicking on the link and selecting Run as administrator from the list that appears.

This is especially the case if FSX is installed in the default location - C:\Program Files\ or C:\Program Files (x86)\
It might be that because it is not being installed with administrative authority, that it is not installing properly.

Hope this helps