@madman141272 Download the latest official version here:

https://download.recalbox.com/

There is a mini tutorial explaining how to flash the image.

Read the documentation to better understand:

https://recalbox.gitbook.io/documentation/basic-manual

And, if you want, watch the video tutorials (enable subtitles):

https://www.youtube.com/playlist?list=PL2oNQ0AT7fx2ExiSNrfHUzga5GnogI4sh