I am using version: OSCOM CE Phoenix v22.214.171.124
Yes I figured out the issue with the database names - I simply added the includes to database_tables.php in the bm_ebay.php file which fixed the issue.
At the moment I do not an eBay developer account, I have applied one but it says it can take at least 24 hours. Hopefully the current situation will not mean this will take longer than usual. Without the keys or tokens I am unable to proceed any further.