I am seeing the towbar always on my TBM900 - clean install of X-Plane 11.
I noticed that there is an entry in the log file that is a bit suspicious:
2020-05-16 14:51:51 TBM900[shader.c:429]: Cannot load shader C:\Users\ray.WESTBROOKE\Desktop\X-Plane 11\\Aircraft\X-Aviation\TBM-900\plugins\systems\data\librain\droplets.comp.glsl430: compile error: ERROR: 1:78: 'location qualifer' : the "location" qualifier cannot be used when a "binding" qualifier is also provided. Use "offset" instead
I am upgrading my laptop from one with Intel UHD Graphics 620 so I can run faster - but this might be a differen problem?