If you have lost it, download a backup of the full shader and preset package here. This contains GShade's shaders and presets, obviously. Back up the C:\Program Files\GShade\gshade-shaders and game\gshade-presets folder. Identify your game folder, and open it in Windows Explorer. Uninstalling it after will break ReShade! 1.
You can uninstall it right before installing ReShade. It does not remove GShade's executable file. Uninstalling GShade removes the gshade-shaders folder which contains all the content. If you are having issues like the screen turning black, read the mini-FAQ at the bottom of this document! 0. New: FAQ has been updated for ReShade 5.7.0 features. ( Korean version / 한국어 버전 / Chinese version / 中文版) (a guide by rika tested, should work fine.)