If a user has multiple folders, it is painful to manually expand them all and select the contents of the folder. Dragging and dropping the folder should be possible, this is an intuitive UI design that needs to be implemented.
Welcome to the TestComplete Feature Requests board!
Here you can review submitted feature requests and vote up the ones you like! If you can't find the feature you want - go ahead and suggest your own idea. Ideas with the highest rating can be implemented in the product.