Sometimes Showbie will not be in the selection of apps when sharing files but here’s how you can easily change that!
Check if Showbie is hidden in the list
Scroll to the very end of the app list
Tap More (...)
Tap the slider next to Showbie so that it is green
Now Showbie should appear in the list!
Also, check if there is an Open In option (instead of More). Tapping this should bring up another selection of apps that includes Showbie.
In iOS 14 or later, you'll need to tap and hold on the Showbie icon to find the "Open In..." option:
Need more help? Reach out to firstname.lastname@example.org!