For some reason the file for the Aqua Blaster Slide isn't in the coastercar folder nor the track folder. What should I do and what is the file name?

If you're sure they were there originally, try deleting your coastercar and track folders and replacing them with your back-up coastercar and track folders. Apart from that I'd wonder why those files are gone and to where.

I have a backup? where?

Back-up would be the control copy of fresh RCT3 install you’ve saved somewhere safe on your system, and also any RCT3back-ups you’ve made since.

For now you can look in the TrackedRideCars folder and the TrackedRides folder for the "Master Blaster” file. If it’s there that would be the aqua blaster file.

OKOK THANK YOU!!!!!!!!!! I didnt seem to have that file in the COASTERCARS section. I didnt know what the file name was. Thank You!