To switch the PORT, simply plug out the camera from its port and then insert the cable to another port. You might have to wait for the installation to finish properly before using.
Secondly, to delete the cache, navigate to the following location and delete everything you see in the cache folder. Make sure there are no apps using Bandhub at this time.
Note: Replace with the actual username where Bandhub is installed. This is your Windows username currently logged on.