miniOrange plugins are sold through Atlassian and you can upgrade the licensed user-tier of miniOrange plugins from your My Atlassian dashboard. Please follow the steps given below.
1. Log into My Atlassian, the account page will display.
2. Click next to your Atlassian app license being upgraded.
3. In the Actions section click Upgrade.
4. Select either Stay with Server or Upgrade to Data Center, depending on your preference.
5. Make sure the checkbox is ticked for the product/app being upgraded. In the Upgrade User Tier column, select the desired User Tier.
6. Review the order and click Add to Cart
7. You can either Check Out and process a payment online or click Save This as a Quote to pay later.