Yutaka, the new beta version didn’t work, yet. Have to add a new Reg_DWORD value “AltNodeImage” in reg file as you mentioned. Have to add DWORD (this is for 32bit) to make the icon work.
Don’t understand why My 64bit EE needs to add a DWORD for a 32bit OS.
BTW the icon is a square with white color as background. There is an arrow in it. When the contents is in extension, the triangle turns to 45° down. When the extension is closed, the triangle turns to an arrow point to right.