How to restore / refresh thumbnails?

Asked by TenLeftFingers

Podbird wouldn't launch so I deleted some files - possibly in.config. Now it works but no images. Is there a way to refresh them? I know removing and adding again works but I loose my progress then.

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Nekhelesh Ramananthan Edit question
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Launchpad Janitor (janitor) said :

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

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Nekhelesh Ramananthan (nik90) said :

There is no way to do this at the moment, but adding a settings option to do this automatically/when clicked should be possible. Attached bug report to track work item.