Open the executable that is inside the bin folder.
Search for OpenJDK. Find the application description and change it to your app name. Close this tool.
It changes the title in Task Manager and will probably also change the title in the notifications center.
I followed same steps you provided above, but they did NOT resolve my same issue.
I saved and copied RH-edited EXE to my application installation path's 'bin' sub-folder, but still get this in Windows [10] taskbar when running root install folder's wrapper EXE:
So, not sure what I'm doing wrong. Any tips will be appreciated.
Thanks
P.S. I rubbed out my application name, but did replace "OpenJDK Platform binary" with it for 'FileDescription' value..