Board Thread:Support Requests - Getting Started/@comment-4820059-20151014163436/@comment-24551580-20151014164312

Could you please elaborate? Do you mean you have haad a wiki closed, and now have the option to download the XML file containing its content? If so you, download it, and then use Special:Import on the target wiki to upload the content.

Edit: Looking at your other post, do you mean you deleted a wiki as an alternative to preventing anyone editing ahead of a certain time? In that case, you may still have to create a new wiki. Alternatively, Special:Contact/general may be helpful, but I'm not certain of whether it can simply be reopened?