Paprika 2 was originally released over ten years ago and is no longer being developed and supported and is not compatible with macOS Sequoia. If you have upgraded your computer to macOS Sequoia (or later) you will also need to upgrade to Paprika 3 in order to maintain compatibility with the latest version of macOS.
Please note that Paprika 3 is sold separately from Paprika 2 and would need to be purchased from the Mac App Store. Once you have installed Paprika 3 you will be able to sync your data over by logging into your existing Paprika account under Settings -> Cloud Sync.