Lost Collection

I hope someone might be able to help provide the answer to this.
After an update to Postman, the collection and requests that I had saved have all disappeared - when I launch Postman, the collection is empty :frowning:
I have the ldb files from the %APPDATA%\Postman\IndexedDb\file__0.indexeddb.leveldb directory but can’t decipher them to get the information from them. Their size suggests they have the information I need.
I haven’t yet successfully managed to sync my local machine to my PostMan account - that just complains about a WebSocket error

Any advice?