It is possible to change the styling of some html tags, the logo and URL for HTTPS. You can change this as described below. Please observe that once the official support for altering the HTTPS layout has been implemented into GUI it might be necessary for you to migrate your changes into the new layout.
These files are made for the current version of zFTPServer, installing these on an older version of zFTPServer may cause issues.
You can download templates at https://secure.vastgotadata.se/%2FBq3VHMKH/customize.zip. These should be placed as described below and modified to your needs:
zFTPServer\ customize\ css\ customize.css htm\ browse.html logout.html login.html img\ logo.png
Modification of the graphic design should be in customize.css to prevent problems with future upgrades. All changes you do to these files will be immediately reflected on the published HTTPS interface, and if you simply remove these files zFTPServer will automatically revert to the original.