Ok so i restarted 2.0.3 and boards manager showed tensyduino was not installed at all. I installed 1.57.1. Restarted 2.0.3 and upgraded to 0.58.2 and it seemed to work this time.
This is the output:
Tool...
FYI:
Received these messages when i installed .58.2
Configuring platform.
Platform teensy:avr@0.58.2 installed
Uninstalling teensy:avr@1.57.1
Error upgrading platform: platform not installed
Uninstalling...