This is the first (and likely only) version of the Celeste Texture Randomizer.
If windows flags the exe as a virus, try downloading the zip file instead.
If that still doesn't work, this link : https://www.howtogeek.com/bypass-chromes-failed-virus-detected-message/ explains how to get around it.
Check the readme.md file for instructions on how to use.
Happy Modding!