V20 worked great! It sent the print, and I didn't see any errors in the log. I also tried the upload and simulate options and didn't have problems with any of them. Thanks.

Thanks for the quick response. I downloaded V19 and now the plugin shows up in the extensions list. I added my printer, but when I tried to print a file nothing happened, but these lines showed up in the log.

2018-10-05 21:57:13,102 - ERROR - [MainThread] UM.Logger.logException [84]: Exception: Unable to write to file leaf_cookie_cutter: name 'dialog' is not defined
2018-10-05 21:57:13,106 - ERROR - [MainThread] UM.Logger.logException [88]: Traceback (most recent call last):
2018-10-05 21:57:13,111 - ERROR - [MainThread] UM.Logger.logException [88]: File "X:\3.5\build\inst\lib\python3.5\site-packages\UM\Qt\Bindings\OutputDeviceManagerProxy.py", line 126, in _writeToDevice
2018-10-05 21:57:13,115 - ERROR - [MainThread] UM.Logger.logException [88]: File "C:\Users\Spencer\AppData\Roaming\cura\3.5\plugins\Cura-DuetRRFPlugin\DuetRRFOutputDevice.py", line 126, in requestWrite
2018-10-05 21:57:13,119 - ERROR - [MainThread] UM.Logger.logException [88]: if dialog is None:
2018-10-05 21:57:13,123 - ERROR - [MainThread] UM.Logger.logException [88]: NameError: name 'dialog' is not defined

I also tried it in Cura 3.4.0 to make sure that what I entered for my printer was correct and it worked fine.

Similar to this post. Re: DuetRFF Cura plugin - not working/recognizing in cura?

I just installed Cura 3.5 and downloaded the DuetRFF plugin to use with it. The plugin shows as installed in the installed plugins list, but it is not showing up on the extensions tab. These are the two errors in the error log that seem relevant.

2018-10-05 07:41:30,502 - WARNING - [MainThread] UM.PluginRegistry.loadPlugin [401]: Plugin Cura-DuetRRFPlugin-master uses an incompatible API version, ignoring
2018-10-05 07:42:16,007 - INFO - [MainThread] Toolbox.src.Toolbox._updateInstalledModels [298]: Found a plugin that was installed with the old plugin browser: Cura-DuetRRFPlugin-master
2018-10-05 07:42:17,967 - INFO - [MainThread] Toolbox.src.Toolbox.canUpdate [489]: Could not find package [Cura-DuetRRFPlugin-master] as installed in the package manager, fall back to check the old plugins

I tried the plugin in Cura 3.4 and it showed up as expected. Thanks.

I am using the option to turn the ATX power supply on and off using the controller. The problem that I run into is that I will try to execute a command and forget to turn on the ATX. I have had it lock up or create heater faults because it isn't able to actually execute the command. I made a tweak that sends the command to turn on the ATX supply if an action is selected that would require it. It would be nice to see this implemented in DWC.