This issue started in v17.4 and after downloading the new 18.4 I'm still getting the same issue. When I go to add or edit a new DB connection, I get this error:
Could not load connection type:Oracle
And then the window that follows (the usual "New / Select Database Connection") is blank under the Name/Un/Pw boxes; so where you would have an Oracle tab to enter the connection specifics into.
The program starts fine, I can open and work in the existing connections no problems.
I'm on version 18.4.0.376-1900 with JRE 1.8.0_181 (built in, I downloaded the package with it included) running under Windows 7.
Can't seem to find any useful information on the web, so i thought I should try the source!