No Bro it didnt work, I deleted the entire folder, and tried reinstalling 3.5.14 version and the app simply dos not install and says the same "app not installed".
I rebooted the phone and tried as well. This however made me re initiate the google voice search when I tried Google now, BUT unfortunately it still does not work with English (US) chosen. The moment I switch to English (India) it works, but I loose "from any screen" and "from lock screen" option. This is strange behavior, as everywhere I read its said the language should be set to English (US) for this to work ,,,,,,,,
HTC One | Samsung Galaxy Nexus | iPhone 4