vBulletin gives you the ability to download and upload options settings for installed products, including vBulletin itself.
To download options choose Download / Upload Options from the vBulletin Options section of the admin control panel.
From there you can choose the product you wish to download, vBulletin will export a XML file that you can use at a later date to upload.
To upload settings for a product, on the same Download / Upload Options page there is a section to Import Settings XML File, from there you can choose a file to upload.