Lychee Slicer can be activated on up to 2 computers at a time.
If you've reached that limit and need to install it on a new device, you can free up a slot by revoking one of your currently activated devices.
To revoke a device: Go to File → Preferences → My Account → Saved Computer List, then click the red bin icon next to the device you want to remove.
Important: You can only revoke a device once every 4 days, so make sure you're removing the right one.
If you're unable to revoke your devices or have lost access to both computers, contact support at https://mango3d.io/contact-us/ and we'll reset your license slots manually.