1) Restart in Troubleshooting Mode (Help → "Restart in Troubleshooting Mode…”), which temporarily disables all plugins. Please always do this before reporting problems.
2) For the file-sync error, make sure the file isn't open elsewhere on your computer and that security software isn't interfering.
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2) For the file-sync error, make sure the file isn't open elsewhere on your computer and that security software isn't interfering.