I have both Trados 5 and SDLX 2004.
I prefer working with Trados, but my customer demand SDLX.
Can I still work with Trados and when completing the work convert to SDLX and deliver?
Have you tried saving the trados file in .ttx format and the opening it with SDLX?
I often receive .ttx files created with SDLX. I translate them with Trados and then the client opens them with SDLX.