I have had a collection of .bib files and started to learn Zotero. I imported the collection to Zotero and made "keep updated" with this collection. Then I imported more .bib collections and made "keep updated" for all collections. Then I deleted the first collection in Zotero and in the disk too, and cleaned all additional folders in Zotero such as "Deleted" and "Duplicates". But I was very surprised that the deleted collection has been restored in the disk (not in the Zotero). I supposed that it was connected with the synchronization library with Zotero and I broke off the sync. But the collection is still restored nevertheless. I inspected the Better Bibtex preferences and found that the deleted collection is still in the "Automatic export" list, and there is no option to correct this list. To solve this problem I deleted the folder "better bibtex" and files better-bibtex.sqlite and better-bibtex-search.sqlite and restarted Zotero. The list of synchronized collections becomes empty now. I made once more "keep updated" to the rest collection. The deleted collections are now not restored. I think it must be possible to correct the list of synchronized collections. But maybe I missed something in preferences?