It's something that the platform will not be able to import through integration studio, while it might be able to recognize the tables, querying does not work, so I've disabled finding these tables altogether.
When I was performing the tests I noticed that it didn't work properly, R&D's response is that is not supported yet.
A short term workaround that you might apply is to create views in the progress database that abstract away from the original name, and consume those views from OutSystems instead of consuming the original tables.
Doesn't Progress have aliases like SQL ?
Attached are versions of your plugin with some changes to support multiple databases on a single connection, for OutSystems 9.1 and 10.
It also sort columns alphabetically and includes the rowid as the first attribute of mapped entity.
DatabaseSDK-With-Progress for OutSystems 9.1
DatabaseSDK-With-Progress for OutSystems 10.0