HELP! "There was an error starting Zotero"

I am getting a message and cannot open/use Zotero. Has anyone had this issue? I am hesitant to delete Zotero and reinstall because I don't want to risk losing almost two years of citations. The Message reads as:

Error: Error(s) encountered during statement execution: database disk image is malformed [QUERY: SELECT version FROM version WHERE schema='lastsync'] [PARAMS: ] [ERROR: database disk image is malformed]

Zotero.DBSConnection.prototype.valueQueryAsync,@chrome://zotero/content/xpcom/db.js:709:13
From previous event:

*and so on*
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