The application UI is not working properly. I have used this product for years and now the simple activities like moving an entity and creating a relationship is not working.

When adding a second entity, I can not move it to a different location  on the design panel, all entities move together.  Secondly creating a relationship by dragging is not work, either nothing happens when dragging the relationship arrow or it creates a relationship to the same entity.  Very from frustrating.  I can not use this tool at this point.