Subscription backups - selected "Share" and made one mthod the default - now can't use any other option.

[dreaded369]

I'm lost - I selected "Messenger" to share a backup. I can now find to undo this or select another option.

Have I missed a setting?

[Zvonimir-FUTO]

Open Messenger settings in system settings and under Open by default click on Clear default preferences.
Keep in mind that steps can be a little bit different depending on your device and android version.

[dreaded369]

Thanks! I had looked there but skimmed the heading "Other default preferences" was a bit vague.