Well there's a simpler way.
1) extract transdata to your transcendence directory
2) create a shortcut to it
3) now right-click and choose "properties"
You should see something like this:

4)at the end of the "Target" box, add " /decompile", so you have something like this:

5)click OK, then double click your shortcut. Transdata should now decompile Transcendence, and you have a permanent shortcut if you need to do it again.