Update README.md

Author: connerglover

README.md

@@ -7,6 +7,7 @@ CRT is a tool that aids speedrunners and moderators in finding the accurate time
 1. Navigate to the [releases](https://github.com/connerglover/Conners-Retime-Tool/releases/) page, here is every binary of CRT.
 2. Locate your desired binary, the version is indicated by the title of each release, as every binary is named the same.
 3. Once the binary has been located, click on its name to download it. Once the download has finished, open the file.
+4. Get a PySimpleGUI License (For Free) and input it into the software. (Because I refuse to pay for PySimpleGUI, until I redo the GUI, this is required.)
 
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