After you run SWAT, be sure to do "SWAT simulation" -> "read SWAT output," and then make a check mark next to "output.rch, output.sub," etc. and then save the simulation?
I'd open up microsoft access, go to your scenarios folder, choose the scenario (which would be "default" if you didn't save a particular run)->"tables out," and then on the right hand side of the screen, double click on "rch." If you don't follow the steps in the 1st paragraph, though, nothing will appear in microsoft access. Good luck.