Jose,
With Powershell, many of the features like Angular server startup will not work properly.
If you still want to give it a try, then you can add the below line to the settings section in the settings json file ( Go to Window > Preferences > CodeMix > Extensions and click on the icon to the right to open the settings json file) :
"terminal.integrated.shell.windows": "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe"
Close the Terminal+ view, reopen it and open a new tab to see the changes.
–Swapna
Genuitec Support