2.1 - How do I download a script

Go to the App Store and Click The script you want

Go to your account and make sure the script is there

2.2 - How do I run a script

Run Scriptlink

Make sure you are logged in

Double Click the script

2.3 - How do I edit a script

You should get a good editor first, however you can use the builtin editor if you wish. If you are an advanced user you can even customize it. It is the file in scripts\libs\sc_editor.py

Right Click the script. And click Edit

Some editors you might try

2.4 - How do I install a missing library

Open the settings tab

Click Install One Lib

Click Fresh Install(this installs the latest version and all dependencies

Or Click Install

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2.5 - How do I update a script

Right Click the script and click update.

2.5 - How do I stop a script

Simply click the F5 Stop button on the open script tab

You can also hit F5. Or Ctrl-Escape if its really bugged. Also you can close the tab by clicking the X which kills the script.