Please, try this. You just have to deactivate the license using Command (Console), then reRun UiPath and it will ask you to register your new license.
Try this in Command Console:
- cd C:\Program Files (x86)\UiPath\Studio\UiPath (or the Path where is installed your UiPath Studio)
- regutil deactivate
- Run your UiPath Studio and register your new license
Hope it can help you guys. Greetings.