Illustrator SDK :: Porting Live Effects - Different Plugin File Names

I've been working on embedding an Illustrator Live-Effect plugin  to a new Illustrator CS5 plugin.One of the live-effects alters the text of text objects to use standardized abbreviations for place labels in maps.
 
I have ported the plugin using the exact same Live Effect name and the same parameter names to the live effect dictionary of the art.This in the hope that when I open the illustrator file in CS5 the effect will continue to work on converted text art.
 
But when I open an Illustrator 10 file in Illustrator CS5, the text object comes up with an "<Unknown>" live effect entry in the Appearance panel. And as the text is converted from legacy text to new ATE-text, the result of the live effect is also gone.
 
Studying the contents of the illustrator files, I find the following in the Illustrator 10 file
 
/BasicFilter :
(Abbreviate Text Labels...) 1 0 /Filter ,
(VisualMap Effects) /PluginFileName ,
(Abbreviate Text Labels...) /Title ,
/Dictionary : /NotRecorded ,
4 /Int (vmAbbrType) ,
[code]....

it isn't working because the name of the plugin file is different (or is it another reason?)It's a bit tricky because  I have now combined several filters and live effects from several earlier plugins into a single new plugin.
 
It is easy to receive a notification upon opening a document and check if it's an earlier version of Illustrator.But how do I go about tracing the art tree to "upgrade" these live effects to the current plugin?