Quartus II project Archive & Un-Archive

After getting a project archived, the whole project including hardware design & software project become read-only.

Either hardware or software project can not be opened. I know I can unarchive the whole archived project to a new folder, just the original project files look useless no more.

Is there a shortcut to resore or unarchive archive project in the original folder?

If someone had this experience before.

Thanks,