I can't really speak on RSC as I don't use it. However I would never even envisage migrating to a new version of RoboHelp until I was sure my currrent projects were tested using it. Download a trial, install both RH and RSC, take backups of all your projects - as there is no going back once you have opened a project in RH8 - and test away. Think about all the steps you employ and go through them monitoring the results. Only then can you say whether upgrading is right for you.
Can you point me toward how to make a backup of the RH5 files so I can convert to 8? I inherited a RH5 setup and was told to "make it work" in RH8. I have a local copy of the current files and they do not open in RH8. All of the tutorials tell me how to create individual aspects of lists and other tiny tasks when I just need the big picture.
Making a backup is simple. Open Windows Explorer and make a copy of the project folder. Place the copy in a different location. Network server, Thumb drive, CD/DVD, etc.
The easiest way I found to drop a project from source control is to make a local copy (C drive) then pull the network cable. Open the local copy, say no you don't want to browse for the data base then say you don't want it to look for the data base in future. You can plug the network cable back in as you now have a copy of the project not associated with any data base. You can put a copy of that where you please.
When we converted (5->7 and 7->8) we installed both versions on each machine. For each project, we made a backup and opened the project with the new RoboHelp. As it happened nothing nasty happened, but the idea was that we could, if necessary, repair things with the old RoboHelp and upgrade again.
As always, backups are imperative.