You are talking again about going with a 0.19 model back to 0.18. I accept that you have difficulties updating one of your computers, but we shouldn't make this a general issue. The real problem is serious enough.
I remember that there were errors in the placement/rotation of secondary views which were fixed in 0.19. You may search the forum for that discussion. Uwe, did you raise this issue?
So here we have this situation:
- FreeCAD had made in 0.18 an error;
- the workaround was, to enter wrong values for certain properties to compensate the error;
- the error is now corrected, which means that opening a file with the erroneous values shows them from the current point of view correctly, i.e. with the errors.
I see these use cases for such files:
1) open an 0.19 model in 0.18
2) open an early 0.19 model in current 0.19.
3) open an 0.18 model in 0.19
Regarding the fact that wandererfan can currently not participate in TechDraw development at his well known pace, I propose that we don't even consider fixing the use cases 1 und 2:
Thinking about use case 3 reminds me of the situation when we made the transition from 0.16 to 0.17: there was a migration algorithm implemented which almost never worked, and there was a separate migration program in the make which was never finished. I was expecting heaviest user complaints, but nothing happened. We had to explain over and over again what a body is and what should be inside (just like today) and sometimes we had to recommend to delete all features and keep only the sketches for rebuilding a model.
And that was it.
With a heavy heart I would therefore recommend the following solution: If somebody is eager to fix this - good! But if not, we could well leave it as is, but we should then of course mention it in the release notes or in the TechDraw wiki or whereever. It shouldn't be at all a show stopper for 0.19.