It may be a bit older, but for RMMV there is the possibility to use enigma virtual box. It offers at least some kind of protection, so you might want to check it out. And in addition it has the nice feature that it reduces the amount of indiviudal files and folders.
Here's a link to a short introduction on how to use it for MV:
Guide for Enigma
Downside: I believe it only works for Windows, but I am not 100% sure as I only work on Windows.
You can use Enigma Virtual Box with any version--it doesn't have to be MV. However, like ShadowDragon said, it doesn't actually add any protection. It's just as easy to unpack something that is packed with Enigma VB as it is to undo RPG Maker's default encryption, so anyone who is capable of doing the latter is probably also capable of doing the former.
And since virtualizing the files comes with a performance cost, I personally wouldn't bother. No sense in raising the minimum system requirements of your game if you aren't actually getting any additional protection from it, because then the only people it actually impacts are the legitimate players of your game.
I don't know if I'm in the right place, but I'm looking for an Encryption program to use for my RPG Maker MV game so as to encrypt my game data. All the youtube tutorials I've seen recommend not using the default encryption that comes with MV, but I'm in a little over my head and I'm not sure where to start looking for free programs that are easy and safe to use.
I was wondering if someone could give me suggestions and/or point me in the right direction to start looking things up.
Like Andar said, there aren't any particularly effective options that are free. The best thing you can do for free would be something like Poryg's
encryption plugin. However, that's only going to make it so that random people can no longer use a pre-existing tool to decrypt your game with the click of a button. However, anyone who knows a bit of JavaScript could still figure out how to decrypt your game pretty easily. So if your game winds up popular, you could probably still expect the decrypted version to circulate around the internet.