If you want to update from PTC version 7.0, the page Migration to Version 8 contains a troubleshooting chapter that might be of use.
For users with an active Space Tree Creator and Page Tree Creator license: You can contact us on our Service Desk . Since we don’t want you to pay double, we will grant you a pro rata promotion of your Space Tree Creator subscription that you can apply to your next Page Tree Creator Pro subscription.
Version 10
Version 10.0.0 - Compatibility and Bugfix Release
Compatibility
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PTC is now compatible with Confluence version 10.0.3
Fixed Bugs
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Fixed an issue with numeric top page label values in the create page button