Is there any possibility to open a RoboHelp project with RH5 or RH7 after updating and editing the project with RH8? Or can RH8 be downgraded, as I could not find a possibility to buy a license for any of the above mentioned older versions.
Even if you could find a RHX5, RH6 or RH7 licence it wouldn't do you any good once a project has been opened with RH8. Doing so upgrades all the underlying project files and the topic HTML. It is just not backwards compatible. You can read more about this here.
Read the RoboColum(n) for a tips, tricks and musings on the Technical Communication Suite products.
Many thanks for that, I was hoping there might be a way to work around it. But, it is clear now!