Installed GRM 8.0, playing Crusade. Launched a huge game with a dozen races, no issues.
For a clean install, rename the existing My Games/GC3Crusade folder which forces the game to create a new clean folder. Launch, quit and install GRM in the new GC3Crusade folder. Then add in any other mods or designs after GRM is installed. But this mod is so awesome, you really don't need any additions. This method resets your preferences, so be sure and recheck Enable Mods.
The races and new ships are incredible. I've just started playing it, but so far the new anomalies and components add a lot to the game.
Thanks for a GREAT mod! This is a must for any new players.