Unfortunately no, it's hard coded.
The disclamer is there more for my own safety - I didn't ask the original author for permission and while there is not a single line of code from the OG RGM (since there are none available) it _should_ be safe but I'm not sure.
it's a grey zone and it's better be safe than sorry.
Also there is another reason: Steam trash scam. There was a ton of bad RGM games released in Steam and I didn't want to increase their numbers by giving something more stable on modern Windows versions than OG RGM.