It is interesting I have to say; I've been using INDI since 2015 and during that time also bought Sequence Generator Pro. I use both but have been migrating more and more to SGP, even though I like the INDI approach better. The general problem the OP mentions (stuff that always worked, suddenly doesn't) I experienced way too often and would have expected that to be less frequent of a problem at the end of 2018. Bugs are always present, but specifically this type should be able to be handled better I think, with the proper checks in place and such. My strategy right now is to watch the forum closely until this type of problem isn't mentioned very often anymore and then I'll fire it up again.