I downloaded the plugin (See Comment #29) from http://hplipopensource.com/hplip-web/plugin/hplip-3.11.7-plugin.tar and the HPLip Toolbox. Then with HP Device Manager I tried to Install the plugin manually, but it said: "Plug in install failed".
I downloaded the plugin (See Comment #29) from hplipopensource .com/hplip- web/plugin/ hplip-3. 11.7-plugin. tar and the HPLip Toolbox.
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Then with HP Device Manager I tried to Install the plugin manually, but it said: "Plug in install failed".