Importing an old .CHM file into a RoboHelp 2017 project

[#1]

How can I import an old .chm file built using RoboHelp X3 into a RoboHelp 2017 Project?

[#2]

How can I import an old .chm file built using RoboHelp X3 into a RoboHelp 2017 Project?

[#3]

If you only have the chm, have a look at Peter Grainge's site under Reverse Engineering:

Reverse Engineering