Uninstalled SH3D again (used regedit to remove every sh3d-key). Made plugins-folder (C:\Users\user\AppData\Roaming\eTeks\Sweet Home 3D\plugins) and copied .sh3p files there. Tried .jar-version. No errors, SH3D runs fine, but only the RotateHome-plugin shows up in menu.
Then removed the eTeks-folder and tried again the installer version. Added same plugins by double clicking and SH3D gives the same message for each plugin (as always): "Plug-in was successfully imported. Its features..." and so on, but after restarting SH3D, no AdvancedEditing or calculateWalls.
I give up. Perhaps future versions (of SH3D or those plugins) will work with my configuration, but not the current ones...
