To run gacha life extension in your pc you need to purchase the Gacha Life Emulator which will run directly from your desktop without any downloads. You can see many online video guides on how to do this. After purchasing the Gacha Life Emulator you should install it by double-clicking on it and follow the on screen instructions. You can see many live demonstration of how to use the Emulator in the website of Gacha Life.
After installation you have to open your Emulator and click on "start". In the browser you can see the Gacha signboard with the different machines and their numbers. Click on the number of your desired machine and follow the on screen instructions of copying files to your desktop. You need to put all files in the desktop then save it by right-clicking and choosing save as. Once you are done with the step you can test your newly installed Emulator by going to the settings then click on " emulator settings" and change the speed then click on "save all changes".