The Restore function recovers your site files from a backup of your choice. The restore function is useful in cases where you have unintentionally removed directories or files from a domain account.
Noting that your problem is with connection, rather than missing files or having accidentally deleted a domain folder, I think the process you want would be:
[color=#00CC00]Panel > Domains > Manage Domains[/color]
This procedure will refresh the internals over at DreamHost and (hopefully!) restore your ability to connect to your remote site without the need to trouble Support about it.
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How To Install PHP.INI / ionCube on DreamHost