just ask all the users you worked with during development to spread the news. What's that? You didn't actually work with your future customers while developing the software? And now you're surprised that total strangers you didn't value during development don't value your project now? Classic.
This actually happens with shareware all the time. People code up something that scratched their itch. Build a website. Find a credit card provider. Issue a press release. And then are disappointed when there are 0 sales after a month.
If you want to make software for you, go into a cave and do it, and be happy with what you get. If you want to write software for people, then you have to work with (surprise!) people. The payback is, the first day the software ships, you already know it's useful to others, you already have a user community, and they are already spreading the word for you. When people tell you they aren't interested in trying your software, they're telling you your software is not very useful. Either they are right, or you can't describe your software very well.