QB Moderators  only offer a bunch of bogus answers.  

You need to get to WebGility. Sync the Inventry there, then move the plugin to QBD to get all the inventory back.

The other option is to useoftware for bulk transfer like transactio PRO. But be ready to spend time to get the results you are expecting. With Enterrprise whis is easy.  IT  will get you all the data transfer including the receipts. but you have to carefully set up the columns.

PLease, keep me posted of your experiences!! This is a bis subject for POS / QB community.