The condition usually stated is that you don’t enable the option allow multiple parses and infixes. If you do, you won’t be able to use the Interlinearizer when you’re in PT 7.5.
That said, why not have everyone using 7.6? It’s as reliable as a release version (in my experience, and according to the opinion of a couple of senior SIL folk).
[quote] Just make sure that you don’t (ever) have 7.6 and 7.5 open at the same time.
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I think that, to be precise, you just have to never edit the same chapter in 7.5 and 7.6 if they’re both open.
Yours, wdavidhj “not-at-all-risk-averse” H-J