How to view your license key?
If you have a commercial license, you can view your key by clicking on the button "Show license key".
You will need this key when purchasing a license extensions for the server or when purchasing updates subscription.
If you have a free version of MyChat Server, you want see this button.
How to check to which date your subscription for updates is valid?
For a commercial version see the section "Updates valid to":
After this term, you can purchase a subscription for updates or use an old version for an unlimited amount of time.
There is no expiration date for a free version. You can update it to the latest versions with no limits.