From the manual (pag 13):
"Scenario 3: If you intend to spend some time in an Orbx FTX Region without leaving
If you intend to spend some time flying within the boundaries of an Orbx FTX Region, for example Europe
(England, Scotland, Wales, Northern Ireland, etc.), then you can select to use Region Exclusive Mode
To use Region Exclusive Mode, simply select the FTX Region (in this example, Europe), then press Apply.
Note that openLC Europe is not the FTX Europe region and selecting it will cause anomalies in the
scenery.
openLC is a Global addon and works only with Global selected. Scenario 1, Scenario 2 or Scenario 4 are
applicable where openLC is concerned."