Unable to Upgrade from ServiceDesk Plus 9400 to 9402 or 9403

Unable to Upgrade from ServiceDesk Plus 9400 to 9402 or 9403

When attempting an upgrade from 9400 to either 9402 or 9402 the upgrade is failing at 97% with the following error message:
dependent file pgsql/32bit/pg_isready not found
When I look in
D:\ManageEngine\ServiceDesk\Patch\AdventNet_ManageEngine_ServiceDesk_Plus-9.4.0-SP-0.3.0\SERVICEDESK\PostInstall\pgsql\32bit the folder is empty.

Our database is held on MS SQL Server, so I am not sure why it is looking for PGSQL components anyway.

Please can you advise on a possible solution.

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