App installed via GetJar preventing purchase in Google Play

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http://androidforums.com – A few days ago I installed the Paper Camera app for fee via GetJar. Seeing that Paper Camera in Google Play is a newer version (and it's on sale for $0.49) I would like to purchase it via Google Play. Unfortunately, Google Play thinks I already purchased it, and attempting to install or update it fails because st some point, Google Play realizes that I haven't actually purchased the app. Reports of similar problems I've found indicate that the issue will eventually clear on it's own. Is anyone here familiar with this issue, or know how long it will take to clear on it's own? BTW, I have a (General)