Tried the simplest way of creating a custom weldment profile by opening up a current default size of rectangular tube and saving as .sldlfp file in the correct folder. Don't know if I missed a step, yes, I highlighted the sketch before saving, and yes, file paths are correct in "File Locations". As far as I know, it should show up. Funny thing, I had already added 80/20 profiles a while ago, those showed up fine after I created them.
New file is 6 x 4 x 0.25.sldlfp. I've searched through the forum and haven't seen this issue posted. Currently on SW2014 Win7 Professional. Any help would be appreciated.