The support website points to a google sites page that is now 404 missing, and there hasn't been an update to the code since early 2017.
I still use Send/Expect multiple times per day for integration with numerous embedded systems, but was curious what it's status is.
It'd be a shame if it were, since it's extremely useful plugin for tasker integration. I'm not a Java developer, but would love to see this app live on.