can you please try to reinstall the client from MyStandard or www.standardinstall.com? As you mentioned maybe it's related to MacOS client issue: https://partners.hansaworld.com/forum/viewmessage/13/3376
The above applies to the window when it is opened for the first time. If the window is already open and I choose Window/Restore Position, the window takes the correct position. Namely, the upper left ...