Standalone has a different library than my regular Zotero
The standalone on my laptop will not sync. When I tried to reset local data, I got this message
[Exception... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nsIFile.remove]" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: chrome://zotero/content/xpcom/zotero.js :: _initFull :: line 512" data: no]
[Exception... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nsIFile.remove]" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: chrome://zotero/content/xpcom/zotero.js :: _initFull :: line 512" data: no]
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Upgrade Storage
2) I'm not sure what you mean by "regular Zotero" here. Do you mean your Zotero for Firefox library on the same computer, or do you just mean that this one is out of date because it hasn't synced?
For some reason (this is a work computer, and sometimes acts oddly), I can't install Zotero for Firefox. So I installed Zotero Standalone as a substitute, and I think in trying to install two kinds of Zotero, I messed it up. Just not sure how to fix it.
If so, there's no need to use the reset options, and you shouldn't — you just need to sync normally.
For the error above — which I would think would also manifest itself as your not being able to make any changes to Zotero — you'll need to check the permissions in the data directory to make sure your current user account can read and write all files. How you do that depends on your OS, and we can't really help you with that. Zotero just needs to be able to write to its own files. If you don't have any Zotero data on this computer, simply closing Zotero and then deleting the entire data directory (the lowercase 'zotero' folder that it places you in from the preferences) and letting Zotero recreate one should also work (unless the permissions problem is higher up, or unless this is caused by security software).