This is nothing but a Genesis/MD toolset in (*.zip) format, so just fire up your favorite zip/unzip utility(preferably WinRAR), and unzip the archive contents.
Other tools required for usage with SGDK:
-VS Code
*Search for C/C++ extensions(Microsoft Intellisense) after installing VS Code(Click Extensions and search)
-Java JRE 8u301
-Make sure to change your enviroment variables to SGDK/BIN directory(and SGDK main directory to be safe)
*Sorry if my description caused ANY confusion
Other tools required for usage with SGDK:
-VS Code
*Search for C/C++ extensions(Microsoft Intellisense) after installing VS Code(Click Extensions and search)
-Java JRE 8u301
-Make sure to change your enviroment variables to SGDK/BIN directory(and SGDK main directory to be safe)
*Sorry if my description caused ANY confusion