How to force assets to re-cook with new settings?

I switched normal maps to use DXT5 in Project’s settings and it took forever for Editor or restart and whatnot. After it was all said and done, all normals maps turned pink/orange in color (Infinity Blade assets) and assets that use normal maps look totally wrong now.

How do I “fix” this?

Thanks

Never mind, the issue was with compression and texture type (see my other post).