zotero-better-notes/scripts/zotero-cmd-default.json

{
  "usage": "Copy and rename this file to zotero-cmd.json. Edit the cmd.",
  "killZoteroWindows": "taskkill /f /im zotero.exe",
  "killZoteroUnix": "kill -9 $(ps -x | grep zotero)",
  "exec": {
    "6": "/path/to/zotero6.exe",
    "7": "/path/to/zotero7.exe"
  }
}