"Add" button *tries* to work in Studio

I’ve been unable recently to get the “Add” button to work on my P1S. I usually don’t use the function at all, but I have a print that I would like to have multiple parts all on the same plate.

I know I’ve used the function once before with the printer and had no issues, but when I try to use it now, it does manage to go to the correct directory where the models are, but all I see is the .stl for the model originally on the plate, and nothing else. Just for fun, I opened up the directory and tried a drag-and-drop (some guy on YouTube said you could add models that way), but no luck there either.

Firmware is at version 01.06.30.01 and has never been updated. Studio has been updated to what I believe to be the current version, 2.4.0.70. So, I’m wondering if something might have gone wonky after the Studio update, or if it’s something else entirely.

Any ideas? And TIA.

Never mind, it was a Windows issue. The files were like 3 folders down in the folder hierarchy. I moved them out and it’s working again. I should have known that.