Killing a tone

[old_codger]

Posting here because I don't know if this is an Android feature or specific to my Rugby. Couldn't find the answer here or through Google. I have a Profiles app (My Profiles) that I've programmed based on time. After 10P I've silenced everything (I think) except a call from one number. For months, this has worked perfectly. A month ago I reset my phone. Now MyProfiles works perfectly except for one tone - Dew Drops. I get this tone during the day, which is tolerable unless I'm in a meeting. But I get it at night (e.g., 3:45AM). No matter how I set MyProfiles, this tone is always audible. I've used Notification History and found the two app associated with this tone. System UI "searching using GPS" and Application folder request for feedback. In neither case does the tone sound EVERY time these two conditions are met but every time I get the Dew Drop audible tone, one of these apps is the culprit. I can find no way to change the tone. Nothing in my phone's System>Sound>Notifications lists "Dew Drops" as a default. Suggestions appreciated. Can I copy "Silent" to Dew Drops so it makes no sound. Never use Dew Drops.