SandShoe

I started using EN a few days ago and love it so far. I just paid for the personal subscription. However I'm getting worried about reliability. A few days ago I created a note with a screen clipping and a title; nothing else. On the web and iOS clients, I see the screen clipping. On the Windows client I see only the title. However in the thumbnail for the note, I see the clipping. In the windows client I clicked the "duplicate note" and in the duplicate, the clipping is there normally. I have tried exiting EN (in fact resetting the PC given all the sub-processes that run for EN) and no change. My two concerns/questions: 1) if I started editing the empty looking note on the PC, what would get synced? Would I lose the picture? Would it corrupt the cloud-based database somehow? 2) If the master database ever gets corrupted, is there a way to roll back? Thanks.