I have the 2015 Tech suite on my computer and it was working fine. I added Robohelp 2019 stand-alone to the same computer. When I did that it made me re-enter my Tech Suite key. When I did that the RoboHelp 2019 won't work??
It has always been the case with the suites that you can upgrade the whole suite but not just one component using the same licence. If you upgrade a component, that comes with its own key but it does not integrate with the old suite.
The suite key is not valid for 2019 so it doesn't work.
See www.grainge.org for free RoboHelp and Authoring information.
I have separate valid license keys for both products.
Yes I understand. The thing is you have put the TCS key in 2019. If you put
the 2019 key in, 2019 will work but not as part of the suite because it is
not part of the 2015 suite.