Linux Sparky 4.12.0-2-amd64 #1 SMP Debian 4.12.13-1 (2017-09-19) x86_64 GNU/Linux.
Mate (1.18.0) desktop. System up to date.
Right clicking on a x.odb file and attempting to 'Open With Engrampa Archive Manager', ' Extract Here' or 'Extract To...' provokes the message (box):
Could not open "x.odb"
Archive type not supported.
I fairly sure, though not 100%, that these options used to work on an .odb file. Any enlightenment gratefully received.
OK, my bad (failing memory). The x.odb file has to be renamed to x.zip first, and I can use engrampa etc as required.
Consider this post closed/solved (how is that done?).
Change the topic name in the first post adding [Solved] on the beginning.