I see a white screen when launching BandLab Assistant

We'd recommend that you try to repair the most recent C++ Redistributable Libraries (likely 2015 and 2017) on your machine.

To perform this task:

1. Open the Control Panel. 
2. Click Programs and Features. 
3. Select the program that needs to be repaired. (Microsoft C++ Redistributable 2015/2017) 
4. At the top, click Change.
5. In the dialog box, click Repair.

If this does not help, remove BandLab Assistant via the Add/Remove Programs on Windows and reinstall the latest version of BandLab Assistant downloaded from here.