pyxeleditor command not working.
**Describe the bug**
I can use pyxeleditor by going into `C:\Python39\Lib\site-packages\pyxel\editor` and running `py __init__.py` but I can't actually use my own files for this. The way that you are supposed to is by running `pyxeleditor [file]`. But this just says 
![image](https://user-images.githubusercontent.com/69367929/102215039-2370fd00-3ea7-11eb-9e77-0ce391bee61d.png)


**To Reproduce**
Steps to reproduce the behavior:
1. Run pyxeleditor on your files using `pyxeleditor`.
2. Observe

**Expected behavior**
It should run pyxeleditor.

**Screenshots**
Returns an error

**Desktop (please complete the following information):**
 - OS: Windows 10
 - Browser: I have no clue what to put here
 - Version: Latest

**Additional context**
Did the PATH variables get set right?
