When rebuilding the model, the file isn't checked and the curve isn't updated.

I'm trying to make a wing with a single part file that can support multiple airfoils. The simplest method to make the wing seems to be to generate two XYZ curves and loft between the two. I can generate the curves with a program, and save them to the appropriate .txt files. The XYZ curves reference those files. Everything is linked appropriately, but I can't figure out a way to update the curves without clicking through 'edit feature,' browse, select the same file, etc.

Is there a "force total rebuild" or "reload references" command? Perhaps I'm trying to fit a square peg in a round hole and there's just a better way to do this? I'm still relatively new to solidworks.

Thanks in advance.