I badly need help !

I was using the trial version and tried to install a terrain file

I modified in the system config the appropriate items

As a result when I attempt to open the program, I am blocked at the very beginning  (page whith the Xcsoar logo) at Loading Waypoints File.

I uninstalled the program, and installed the 5.1.2 stable version

I got rid of the files loaded for terrain data.

I am still stuck at the same place

Thanks in advance

Pascal de clarens