You can try the Legacy to ABC Converter that shipped with C5.5 and
Bo Schmitz of ComSoft7 and Kiwk Systems had a tool to convert Legacy to ABC. I think it was a Utility template. It worked by changing some specific things e.g. “Clarion” to “ABC”.
I think it was a pretty good tool and method. I cannot recall if it tried to change code e.g. LocalRequest to ThisWindow.Request.
Bo died in 2015. AFAIK none of his stuff is available on the web, and it was not purchased nor picked up by anyone. If someone has his paid tools it would be helpful to have them posted on GitHub.
In the Fake Install topic I post a zip of Bo’s free tools.