I can run TeamViewer on my pc but it is not in the device list and I can not add it since i says it is already there,
Hi @samowens, Welcome to our Community, and thanks for your first post!
Based on the description provided, it's possible that you simply need to migrate your device.
For more details, check our article: https://www.teamviewer.com/en-us/global/support/knowledge-base/teamviewer-classic/device-management/migrate-your-devices/
Share with us how it goes, and let us know if you need any further help. Best, Carol