[Therion] Bug in 5.3.7

I upgraded to 5.3.7 and hit a problem. A file that contains both therion inputs and a 3d file import from Survex failed to import the latter. Reverting to 5.3.5 has solved the problem. Graham -- graham.mullan@coly.org.uk 0117 9502556 or 07887 637064 (or 0844 2327803)