[BUG] VCC 2.0 cannot set the path to Unity editor

[Panrium]

Describe the bug
It shows "Cannot read empty file from "C:\Users\Administrator\AppData\Local\VRChatCreatorCompanion\settings.json" each time I wanted to set a path for unity editor

To Reproduce

1. In the project panel, it says "Path to a Unity Editor is not set, you will be unable to open projects."

2. Click on 'fix now', it displays
   

3. Selected "I already have Unity", and set the correct path to my editor, which was D:\2019.4.31f1\Editor\unity.exe

4. an error notification came up:
   Cannot read empty file from "C:\Users\Administrator\AppData\Local\VRChatCreatorCompanion\settings.json"
   

then the program freezes.

5. I went to look for the settings.json file, found out that it is a 0kb file and it shows nothing when I open it with notepad.
   

Desktop (please complete the following information):

• OS: Windows 10 Pro
• Version 21H2

Additional context
I've met similar problem with version 1.6 previously, dunno if it helps

[momo-the-monster]

We will create a new Settings file if the current one is empty.

[orels1]

Something else worth exploring: if the file fails to deserialize (reported by testers), like if some values became null that shouldn't be null, we should maybe open a little window like:

Settings file appears to be corrupted, VCC can make a fresh settings file so it can launch correctly. The current settings will be saved as settings-old.json

With 2 buttons: "Create New Settings" and "Close VCC" to back off.

That way users can at least natively reinitialize and then submit the broken settings file to us / manually inspect it

[orels1]

VCC now automatically clears and re-creates 0-byte settings files and also provides a special experience for settings files that contain malformed json