SP Page Builder Pro v3.8.9

I'm aware of the previous bad decision by JoomShaper to go with only front-end editing, so I chose to not update the extension any further and it's been working as intended, allowing back-end access to all pages. However, now front-end access is only available and when I attempt to edit a page via the front-end, the control panel disappears and edits cannot be saved.
Anyway to salvage this shitshow of an extension so I can edit content successfully and then transition away from it?