I'm about to open an existing RH4 HTML project in RH7, and of
course once I do, there's no going back. I've been playing with the
new (to me) UI. Anything I need to know - or can I expect a smooth
transition for my project.
There has been a lot of development to RH since version 4 so
you will notice lots of useful functionality that you didn't have
before. Best thing is take a backup, roll your sleeves up and jump
right in. It will be well worth the ride. If you have any issues,
post them here.