EXPOSE V1 can crash on start up if you have installed EXPOSE V2 and reverted back to V1. The solution to this issue is explained below:
If you're on Windows, you will need to delete the settings file expose-settings.dat in C:\Users\your login name\Application Data\MasteringTheMix
For some Windows 10 users the the settings file expose-settings.dat is the following location: C:\users\login-name\AppData\Roaming\MasteringTheMix
If you're on Mac, you will need to delete the settings file expose-settings.dat in /Users/your login name/Library/Application Support/MasteringTheMix/
(In Finder hit the option key and click Go to see the Library folder listed)