Unfortunately, this did not work for me.  I had already tried running a report with the customization feature and the names of inactive customers do not show on the list to filter down.

I tried an incognito window as well and it didn't work either.  

I cannot make an inactive customer active either due to the fact that we retain customers when they change ownership but we set them up as new accounts in our system and zero the other out.  

So it is looking like I can't simply run a report with inactive customers only selected.  This is for a year to year sales comparison and should be a report that is simple to run.  Mind boggling to me that it is not.