Your issue is you still have the OLD loaders, that's why I said you don't have the latest update, since the new loaders has been introduced, the updater REMOVES the old loaders entirely so, either you don't have the latest updated installer (possibly antivirus/firewall blocking it), or the removal of their folders failed for some reason (again, antivirus, permissions, etc.)
Check this folder (assuming a default installation)
c:\Program Files (x86)\Addon Manager\MSFS\fsdreamteam-gsx-pro\SimObjects\GroundVehicles
You should have ONLY these:
FSDT_Cargo_Loader_CCL35S
FSDT_Cargo_Loader_CHAMP70
FSDT_Cargo_Loader_CHAMP70_S
FSDT_Cargo_Loader_CHAMP70_W
If you still have these folders:
FSDT_Cargo_Loader
FSDT_Cargo_Loader_HI
FSDT_Cargo_Loader_HI_CargoMain
FSDT_Cargo_Drivers
It means you either haven't updated, or the updater was stuck with an old version, or the updater couldn't remove those so, first thing, try an update Check again, and see if they are removed (they should).
If not, remove the folders manually, and remove this folder too:
C:\ProgramData\Virtuali
then start the sim, and you should only see the new ones.