Deactiving MATE

To deactivate MATE open the Settings screen by clicking on the cogs icon in ther top navigation.
Click on the "License" tab.
Click on "Deactivate".

Deactivating remotely on another computer

To deactivate MATE remotely on another computer, visit the Customer Portal: https://app.lemonsqueezy.com/my-orders

Login with your email address that you used for your purchase.
On the left open the order.
On the right click on "License"

Step 1:
Open your order.

Step 2:
Click on your license to open License Details.

Step 3:
Locate the right instance by activation id and deactivate it.

Finding your activation id in MATE