Hi,
"The package upgrade/downgrade has been canceled" seems to be already working fine in my local files.
I have updated the other 3 ones to use translations.
You will need to manually add the translations for "Select a Product" in the respective javascript-**.po file, and then generate the javascript-**.mo file from that one. Something like:
msgid "Select a Product"
msgstr "YOUR TRANSLATION GOES HERE"
Then, clear your cached files in \uploads\cache\
Finally, download and unzip the attached file, and then replace the following file:
\templates\default\views\clients\productspublic\upgrade.phtml