The older versions have a compatible database except for the compact binary import group type.
If for some reason you want to run an older version before v7+ after using compact binary import groups - v5.9.9.8 will revert the change.
Up-to-date:
v5.9.9.8 (64/32)
Selected older releases for registered users
(for the archive purpose only, contact support if you are not able to run at least v5.x):
v7.4.4 (64/32)
v7.4.3 (64/32)
v3.7.4 (64/32)
v2.9.8 (64/32)
v1.9.9 (32)
