Hey, I've been in your position before, so I thought I'd try and give some insight about why I don't think this is getting traction. This was my user experience:

1. I went to the site, clicked 'proceed', then clicked 'live demo' 2. I saw a login screen, and right before I closed the page I saw some tiny credentials pop up on the bottom of the screen so I put them into the login form 3. I got to a screen where the CSS was all messed up, couldn't see most of the left nav bar, nothing to do, so I bounced. I was using Chrome 91 on Ubuntu.

I can't really comment on the usefulness of UML->web apps, since nobody I know writes UML. I'd just think about how your customers interact with your site a lot more.

Good luck!