If your Shotcut won’t allow you to drag and drop a file in it as it should be, perhaps my experience would help you solve this problem:
- Right click on Shotcut shortcut icon.
- Click on Properties.
- Select Compatibility folder on top part and UNCHECK all the boxes.
In my case, the checked boxes were “Run this program in compatibility mode for:” and “Run this program as an administrator”. After unchecking them, I finally got back my Shotcut accepting files using Drag and Drop. I’m using Windows 10.