Mac OS Catalina, Latest release build.
Open RCT2 was downloaded prior to downloading the Steam version files, and would not open after the steam files were downloaded, producing a window simply reading 'the application Open RCT2 could not be opened'. Upon attempting to fix this by deleting Open RCT2 and re-downloading it, the file downloaded was not a .zip or .dmg file and will not open at all.
I suspect there is a file somewhere in the library that was not deleted when Open RCT2 was moved to the trash and is causing issues - I had a similar issue downloading steam on a different Mac, but I don't remember how to find the files to delete them.
Please advise.