hey Paul,
I am really sorry that delay of this reply,
I've checked in your database revision table `yq5nw_easyblog_revisions`, it seems like almost all the `created_by` columns is sow 0 value.
What I did is run this 2 query in your database :
TRUNCATE TABLE `#__easyblog_revisions`;
UPDATE `#__easyblog_post` set `revision_id`=0 where `locked`=0;
// After execute these 2 query then go back to your backend > Easyblog > post , then it will automatically generate match back the revision id with associated post.
Can you give it a try now? It should work now.