I think the print pretty much speaks by itself, but, either way, here's the scenario:

I have a folder called "wspace_test" (for "workspace).
I added 2 folders: test_a and test_b.
Each folder has it's own Main function.

How do I choose which Main to run?

You can see in the print below that the execution is always defaulting to my test_b/Main.

I think what used to happen (or at least what I'd expect to happen, as a user) is that the currently open class with a main function would be executed.
Now, it seems like it has something to do with the workspace config, but I can't wrap my head around what it could be.

If you're wondering about the original scenario, I have a project with multiple leetcode-style challenges. Each problem has it's own folder, identifying the name of the problem, and they all have a Solution.java acting like Main.
It used to work with no issue, meaning I could add a new folder, copy/paste the previous solution, change the code to adapt to the new challenge, :JavaRunnerRunMain and ta-da.
Now, it keeps defaulting to one instance of the Solution file, not sure why.

Best regards