Lost everything after reinstalling

I've been using SwiftKey for a very long time (before Microsoft got it if I'm not wrong) but I recently noticed it crashing sometimes, so I checked in the faq and it told me to reinstall the app. But after reinstalling, I found that I lost all my data, even though I'd signed in to my account in the old app and new one. Now I've lost all my settings, predictions and themes. Is there anyways to recover this?