Hi Umberto,
Ok, so some strange stuff at least to me is going on here. So I will give you everything I know so far, it may be of no use but here goes
So I have p3dv4.5 and P3dv5 installed on my E drive both are installed in the Lockheed martin directory and both then installed in there own individual directories
All my FSDT airports and GSX are installed for P3dv4 in an external folder called airports which addon manager is within.
When I run P3dv4.5 I have absolutely no issues whatsoever and under the addons tab of p3d I can see the sub tabs addon manager, couatl settings, couatl live update and GSX.
So P3dv4.5 working as expected.
P3dv5 install has only a small amount of stuff installed so far, and as far as FSDT is concerned I only have LSGG,KCLT and GSXL2 installed.
P3dv5 starts without issue and both LSGG and KCLT show as being installed.
Under the addon tab of P3dv5 I have showing addon manager, couatl settings, and couatl live update, and that's it NO gsx option.
However restarting couatl and couatl rebuild cache both work, so something is installed.
You asked me to set gsx to troubleshooting which I cannot do in p3dv5 as I DO NOT have access to this tab, However I can access it through p3dv4.5 which I have done, and when I start P3dv5 the log file you asked for is produced and does look like it is giving p3dv5 information (is this how it's supposed to be?) anyway here is the log file
hope this makes sense to you.
So finally I have no Buildings at LSGG,KCLT and selecting ctrl+f12 does nothing and I get no gsx menu
and addon manager does not retain the registration info for my fsdt products. So every time I restart the p3dv5 sim they require the registrations re entered