I need some quick help, because I have honestly looked everywhere.
Are you having trouble opening files to edit them too? I'm having that problem and am unable to set permissions also.
If I find anything I'll post it, sorry this was a useless post, but at least you know you're not alone
Mark the checkbox preceeding the file for which you'd like to alter permissions and click the button on the top right labelled Chmod
If you'd like to try a free ftp client that implements SFTP check out WinSCP
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