I was curious to try MuWire-0.5.4 so downloaded, but something odd happened. I was not sure if it was an installer or app so opened from download folder. After discovering it was an app I tried to quit but was given a warning about continuing to run. I copied the app to Applic. folder and tried to trash the app from downloads folder but received warning it could not be trashed because it was still running. I checked activity monitor but could not see anything that I identified with MW.
Some minutes later I was finally able to see a Remove from Dock option which had not been there previously. (I should have shown the dock menu options portion which only had an option to add to Dock, not remove.)
These symptoms might have partly been due to not running from the formal Applic. folder in the first place.
Comment: Whilst the keep in tray (but running in background) has been in the Windows OS for many years, I've personally never heard of this for MacOS (with exception of a server app.)
After restarting MW I found it did quit properly after using the (new) exit command.
2. I noticed I had redownloaded the netshare 0.5.2 overnight. After the above restart it is presently attempting to redownload it yet again but with a connecting status and eta of unknown.
3. The mp3 influx has returned for this restart. It's tiring removing them all.
It might be easier to totally remove all of those particular folders and re-add via dnd selected files.