I am not familiar with 'Parallels' or the possible interaction with SF. Try resetting Sound Forge to the default settings (File menu). This will reset the Layouts as well (which could be the cause of the problem) . FYI, layouts (View menu) are stored in 'Username' \AppData\Roaming\Magix/Sound Forge folder (which is a normally hidden system folder).
btw, Welcome to the Magix Sound Forge community @DDT88.
The recommended method of installing a Windows only Magix product on a MAC is to use Bootcamp, making the MAC dual booting with a separate Windows only partition, this ensures that the software can access the hardware directly.
Parallels does not allow direct access to hardware - it simulates the hardware in the virtual system and also lowers the performance of the virtual system.