I've installed Greenshot a few weeks ago and played around with it.
Today I was having a closer look at some settings in my pi-hole.
Looking at some statistics I found that I have a DNS request for getgreenshot.org EVERY 5 min.
Check for update is set to 14 days (2 weeks).
So what causes this rather high frequency DNS request??
Win 10 Pro 64bit
Network using pi-hole as DNS filter, opnSense as firewall router