I try to create drag and drop questions in Presenter 10 and after clicking on Add Question -> Drag Drop, the new window opens but where I should be able to define the questions etc, the screen is just grey. Have the same issue on three other systems as well.
Flash is updated to latest version and so is Presenter 10.
Weirdly the installed Flash version is 15, but a right-click into the grey box shows me version 11.
Just in case someone else has the same problem, a chat with Adobe brought the solution:
On the gray screen, Right click and go to Global settings
Go to advanced tab
Scroll down and click "Trusted location settings"
On the "Trusted location settings" window, click "add" on the bottom
Click "Add Folder" and select "Local disk c"
Click "Ok" and Confirm on "Trusted location settings" window
Worked for me (on three different machines) like a charm!