I didn't see that in the Dell downloads.  It looks like what Dell told you about using the Dell PC Restore (Recovery Partition) is the only way.  F8 at power on.   If you have all of your user data backed up it's not too big of a hassle.   
I posted the following in the incorrect forum so am reposting here. Sorry, this is my 1st posting. Any way to get the Dell Document Viewer back on my laptop? I have new Dell Inspiron 15R and deleted the Dell Document Viewer after deciding it didn't work and was useless. Now that I've downloaded the manuals and read the posts here from this past January I would like to get it back. No, it's not in my recycle bin as I was attempting to get rid of bloat before making a system image. Dell tech supt says only way is to restore the pc to it'sdefault factory settings. I would prefer not to do that.
Need to reinstall Dell Document Viewer