We currently don't have an automated way to change a subscription from monthly to yearly. Thankfully the process is very easy.
Using XOGO Manager
Open the XOGO Manager (manager.xogo.io)
Go to the billing page
Purchase a yearly license: $180 per year (save 25%)
Enter a coupon code if you have one
Select Yes to confirm and proceed
Enter your credit card information to complete the purchase
Once the purchase is successful, your new Pro license will appear under: Profile & Settings → Company → Players.
Assign Annual Licenses to Players:
Next, open the XOGO Manager, click on each of your players in turn, and in the dropdown, menus select the annual licenses that you purchased. See this video: https://youtu.be/xcstEpLxBIw
Cancel Monthly Subscriptions:
Once you are satisfied with the migration - and to avoid being billed for the original monthly subscriptions - go back into Licenses page in Manager and cancel the monthly subscriptions that you no longer need.