Can you please let me know what Windows version you are using.
I'm using Windows 8.1 on my MacBook Pro (Parallels). I can test with Windows 10 which i have on my iMac (Fusion), if you want.
Also, if it’s not too much trouble can you please send me a screenshot of the file view once you imported the package. As I said, there are no files in mine after importing the Transit package.
The converted project is listed in Studio's project list, with the name of the original Transit package. Upon opening it, its content is displayed in Studio's grid, like with any other project, originally created with Studio. Okay, there's one difference: all untranslated segments are pre-populated with their source (because this is what Transit does with its projects (language pairs)).