Hey @SlackHQ - I'm suddenly unable to edit my messages in the Windows desktop app. Up arrow doesn't work, selecting "Edit message" in the More actions menu doesn't do anything either. App is up to date.
On mobile it's all fine, so it's not a persmissions issue or so.
Halp! 
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Wow, that did the trick! Awesome, thanks!
. Sorry to hear of the trouble. Just to make sure, when you go to Preferences> Accessibility> Press Up-arrow in the empty message field to> Is 'Edit your last message' selected?
