In my case it's crashes at any css file. With emmet autocomplete on.
When i try to add new property, plugin_host will go down.
Reset to default state and so on won't help. You can open a few files and edit them, but soon It will crash again.
ST3 v.3190, Win10 Pro with local admin permissions.
The only way to avoid PluginHost crash (i'm not sure if Emmet is on then) it's clear %AppData%\Roaming\Sublime Text 3\Installed Packages\PyV8 and reopen ST3 and while PY8 is loading add a new css property.
After that you can work until you restart ST3.
In short, you have to clear this folder each time before you start ST.
So go on, if you like dancing with ghosts and have enough patience.
I don't, so i have to use VS Code instead and pray to Wbond.