I love this extension, and I got within inches of losing years of sessions.
I was able to find copies of my .blob and .leveldb data folders from a few days before my/Chrome's missteps, but the instructions for a manual restore of V4 data don't seem to work for me. I've tried permission adjusting, and even full Chrome profile data restoring (which totally breaks Chrome now).
When I delete the existing chrome-extension_edacconmaakjimmfgnblocblbcdcpbko_0.indexeddb.leveldb folder, and then paste-in my old .leveldb and .blob folders, they instantly get removed and replaced with a data-less .leveldb folder at Chrome or SB Extension startup. I can't find a way to package these folders in the compulsory .json file format the "restore" function requires, so I'm at a loss. Any help is much appreciated!