Just downloaded this program and tried to use in my email program. Turns out it doesn't work in Chrome at all. This was on Windows 10.
Apparently they had problems with a guy who bought the domain name instaphrase.com before them and they had to change the program name.
InstaPhrase is now called WordExpander and the webpage is located here : http://www.wordexpander.net/
Our users have written 2 comments and reviews about WordExpander, and it has gotten 25 likes