This downloadable Windows-based program "pings" various routers on the Internet, external to dslreports.com, to get a fairly accurate reading of your average "ping" time. The lower the value (response time in milliseconds), the quicker your packets reach their destination.
No. Dr. Ping does not store or send your private information or usage habits to DSLreports. The only thing it does store is your best result for display on a page basically for bragging rights (that is, if you make it) and to display which customers on which ISPs are getting low pings.
Dr. Ping's list of routers are old and could be updated. Some ISPs / backbones could have changed the DNS or IPs, made themselves unpingable or, in some cases, done a bellyup.com and are no longer available.
The good thing is Dr. Ping's results will put you in the general ballpark of your average latency.
Doctorping.exe is just a program -- no installer was necessary. You can remove it by simply deleting the file. If your Windows PC tells you the "file is busy" or you get some other error message, then quit the program first, or reboot if you are unsure how to find and quit programs.
Then, just delete the file. (Use Start .. Search .. doctorping.exe on your entire C: or whatever drive, if you have lost where you placed the program.) Last, select the icon using the RIGHT button and find DELETE on the menu that pops up.