XF 1.3 Accidental deletion of styles folder

I accidentally deleted the styles folder and now all the styles are no longer working even after I have restored the file from the vanilla xenforo installation archive. I assuming the template caches must be rebuilt but I am unable to do this http://siteurl.com/install only gives me 'invalid' as the output
Download XenForo, and re upload the styles folder.
I have already done that. It is not working

*update* Overwriting all files with those in the vanilla installation fixed the issue. Some Add-Ons which make use of ./styles/default/<add-on> required the necessary files be uploaded. I assume this issue is now totally fixed.
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