Hello.
If you get no messages in "Messaging bar", and in particular, the "Import" button gets dimmed when you select a file, then the file is locked and can't be imported. Files exported from ZModeler can be locked to prevent them being imported into ZModeler again. You should be able to import original game files and non-locked files too.

When trying to import the Model, it will not allow me to import anything even after I have Validated my license. It will say the model can be imported but when clicking on import it doesn't do anything. I have reinstalled and tried every method I have saw to fix it but with no luck.