I did run into an issue with the recent 3.3 update. I attempted to load a simple mesh as .obj, but it didn't seem to work.
Thanks for the feedback. I'll address this issue and provide a new update with the fix.
Additionally, would it be possible to use .fbx instead? Most DCC applications us it as their primary file exchange format.
I'll add more model formats in the future. The bigger plan is to add more features around models. Some models have several meshes and animations so I'll have to take that into consideration when building the ui.