Good Morning Brad,
. The directory below should be C:\netmf\netmf4_4_0 I have updated Step 7 in my by post.
Create a directory c:\net4_4_0 and unzip the .NET Micro Framework Interpreter into the directory https://github.com/valoni/netmf-interpreter
The file Microsoft.SPOT.Task is located in here https://github.com/valoni/netmf-interpreter/tree/dev/tools/Targets
Hope this will fix in the issue?