I've looked over dozens of similar questions, nothing has jumped out as applicable. ls returns "arduino-1.8.3" {lower case} ron@ron:~$ cd (or sudo cd) /arduino-1.8.3 returns No Such File or Directory"
In the directory is uninstall.sh but it won't run from the file manager.
I realize I'm probably missing something obvious to an experienced user which I'm not.
TIA
Ron