Hi,You don't need to delete the old copy first. If you have ended up with two copies, it means you specified a different location the second time you installed than you did the first. The installer doesn't currently search the device for existing installations, perhaps we need to. In the meantime, just ensure you install to the same location.
As long as your license file is installed on the PC in your My Documents\SkyDemon folder, the installer will copy it to the device.
I hope this helps.