I posted today a message dealing with a similar problem regarding the module presets in DT 5.0.0 on Windows 10. Please see my message following the link:
The left mouse click does nothing in my case. Right mouse click works correctly, i.e. the preset selected will be activated as a new instance of that module. As interim solution I hover the mouse on the preset option. When it is highlighted I press return key.
I think this is a bug. This behaviour applied to presets of all modules.