Continuous crash using RW6, with Mojave 10.14.4

Hello,
I had to reopen and modify old files that I’ve done using RW6 in an old Mac.
Now I’ve changed Mac and OS (Mojave 10.14.4). I’ve downloaded the latest versione of RW6 and I’ve tried to modify files. I’m able to do that but, when I’ve to Save, program constantly crash.

After downloading RW6 I’ve moved it from “download” to “application”, so it can write, I suppose.
Is there some advise? or I have to buy the new RW?

Thank’s in advance for your time.
Marco

RW6 doesn’t work with Mojave. You have to upgrade…