Migrated Database - Now Can't Access On My Old iPad

In my case (no iPad or probs similar to those of @h2o2wine), I expected to be notified or prompted to migrate once I’d updated OF itself on my iMac, MBP and iPhone.

Because I wasn’t, I went to do it manually (under File >). It worked.

But I just wonder whether by some remote chance 3.6 may be coded in such a way that the checks for anyone who initiates the migration manually are different and cases like that of the OP slip through.

Seems unlikely :-)