What screen?
From the other post that you referred to above, it sounds like you are having trouble getting the marvel split stack to install correctly.
There is a long-standing issue with the double-click to install stacks not always working correctly.
I’d suggest you follow the above-mentioned installation method:
- grab, drag and drop the Marvel Split stack from the installation folder onto the RapidWeaver icon on the dock.
Or - Right-click the Marvel Split stack from the installation folder and select the Open with option and choose RapidWeaver 8.
After either option restart RapidWeaver.