This won't work without Ghost Commander file manager application. Install the Ghost Commander file manager first then install this plugin.
WebDAV plugin lets the Ghost Commander file manager to access cloud services which support the WebDAV protocol.

Attention! Only HTTPS connection type is supported. Will not work with an unencrypted HTTP server!

If server's SSL certificate is not from a trusted authorities do the following:
1) Open the Ghost Commander application's home: panel.
2) Tap and hold on the WebDAV plugin item.
3) In the Settings dialog set the desired trust level.

The following is a short list of known WebDAV supporting cloud services:
https://webdav.4shared.com/
https://webdav.cloudme.com/{username}