You should be able to reopen the last closed/unsaved document(s) in case you accidentally close a document and click "Don't Save."

The Chrome browser has a similar feature: "reopen closed tabs." And Google Docs allows you to view and restore all previous versions of a document.

With Indesign, if you accidentally click "don't save" the document is gone forever, according to the support person I spoke to. You can't find it in the archive folder and you can't "undo" that either.

I was on deadline and accidentally closed a large car dealer ad with 20 cars in it and in my haste clicked "Don't Save."

Luckily it was approved with no changes or I'd have really been set back time wise.