the new version 2.1.0 does not print any watermarks in the individual images. In addition, the html pages for each individual image seem to me to be overloading the transfer to and from my server.
Watermarking is a jAlbum feature. Did you add the watermark through Effects / Text?
The individual HTML pages for each image is needed for Facebook share. If you turn that feature off, those will not generated. By the way how do you mean "overloading the transfer to and from my server"?
Also remember that if you choose Settings > Pages > Link to originals, no watermarks will be applied. That setting causes jAlbum to use your untouched original image in the final album, with no scaling, no watermarks, no logo, etc.