[Zubersoft]

Version 3.8.12 is available through the Microsoft Store - if Microsoft isn't letting you download it, it essentially means that it doesn't think you've purchased the app under your account for some reason. The best way to check this is to create a library backup in MobileSheets under Settings->Backup and Restore->Backup Llibrary, then uninstall MobileSheets, and then reinstall it through the Microsoft Store. This will ensure you are given version 3.8.12. If it asks you to pay again when trying to reinstall, that means the wrong email address is being used (or there is some other kind of account issue that you would need to contact them about).

Mike