The key ProgramArguments
expects an executable file but you provided an application bundle, which is a glorified directory. In order to start the application you have to point launchd to the executable inside the bundle:
<key>ProgramArguments</key>
<array>
<string>/Users/todd/Dropbox/client/CLIENT.BUILDS/MAC/v0.1/ApplicationTest.app/Contents/MacOS/ApplicationTest</string>
</array>
Alternatively use the open(1)
command to run the application:
<key>ProgramArguments</key>
<array>
<string>/usr/bin/open</string>
<string>-W</string>
<string>/Users/todd/Dropbox/client/CLIENT.BUILDS/MAC/v0.1/ApplicationTest.app</string>
</array>