How to change Eclipse window title?

How to change the title (last part of it) of a running Eclipse?

I am speaking about Eclipse distribution itself, not about my program written for Eclipse.

Currently I have the the following title:

1 this part is set in Window -> Preferences -> General -> Workspace -> Workspace name.

Other parts are autogenerated.

I want to change part 2 which is now Eclipse. I have several Eclipses installed and want to refer them here.

UPDATE

I found file plugin.xml inside ./plugins/org.eclipse.epp.package.standard_XXXXX and found it containing a setting

     <property
           name="appName"
           value="Eclipse">
     </property>

I changed this as I like but it didn't affect the title.

UPDATE 2

Also I found setting in plugin.properties

productName=Eclipse

Unfortunately, changing this also didn't affect the title.