Normally, all licenses are transferable. But before doing that, there are a few things you should know.
XMind Pro/Plus licenseThey are life-time packages. Both XMind Pro/Plus license keys contain your email information, which is the primary email of your Paypal account. When activating the software, you will be asked to input both the email address and the license.
If you give or transferr your license to others, you should also tell them the email address associated with your license.
XMind Pro SubscriptionXMind Pro Subscription uses different business mode. The subscription code is also different from the license mentioned above. It does not contain any of your personal information. People just need to have a valid subscription code (consisted with 25 letters and numbers), then use this code to renew the XMind account.
So transferring the subscription code is free. No limitation.