Unable to see Dialog Extension

Hello -

I am looking for some assistance with trying to get started with the dialog extension -

First, I tried adding the repo http://www.polydes.com/repo , and then clicking Install on the Dialog Extension, and I get the following error:
2018-01-14 10:43:47,025 DEBUG [SwingWorker-pool-2-thread-8] stencyl.sw.util.NotifierHashMap: HashMapEvent [type=VALUE_ADDED, value=stencyl.sw.ext.net.NetExtension@44c1d35e]
2018-01-14 10:43:56,137 ERROR [AWT-EventQueue-0] root: Unexpected problem on thread AWT-EventQueue-0: null
java.lang.NullPointerException
2018-01-14 10:43:47,025 DEBUG [SwingWorker-pool-2-thread-8] stencyl.sw.util.NotifierHashMap: HashMapEvent [type=VALUE_ADDED, value=stencyl.sw.ext.net.NetExtension@44c1d35e]
2018-01-14 10:43:56,137 ERROR [AWT-EventQueue-0] root: Unexpected problem on thread AWT-EventQueue-0: null
java.lang.NullPointerException

I then tried downloading "Dialog Extension Stencyl 3.3.2.zip", clicking on "Settings", "Install Extension", and then "Enable", which seems to work, but I don't see the extension listed on my dashboard.

I am using Ubuntu 16.04 LTS and Stencyl 3.4 Beta 4.  I believe the issue is unrelated to Linux, as I saw similar issues when I tried in  Windows 7.

Any suggestions on what I can try next?

Thanks in advance for any guidance.

Try following these instructions.

http://community.stencyl.com/index.php/index.php?topic=54582.msg291003#msg291003

Thanks Justin, I followed your instructions and everything is working now.