I found a previous thread on this issue and it didn't help me all the way.
I used an existing profile family and re-saved it as my new profile, changing the sizes in the 'Family Types' box. I hope that's all it takes...
I've highlighted the railing I want to change, hit Edit/New, hit Edit on the railing structure dialog box, hit the drop-down box to select the new profile I've loaded in but it's not there. The family category is also set to Railing, and I've tried changing it to <Generic> and that also doesn't work.
The previous thread mentions a 'family browser' and I don't know where that is - any help on that please?
I now believe that I've placed the new profile in the wrong folder because the profiles that I see in the drop-down box of the railing edit shows other profiles than the ones shown in the folder where I placed the new profile. Right now it's in Imperial Library/Profiles/Stairs. Is there another place where the profiles for railings are located?