If you got the dreaded Invalid UTF-8 character issue, I fixed it and I'm sorry!
So, Butano comes with lots of amazing libraries in order to help speed up development time. Because it's open source, I've made my own tweaks to the library to enable it to better work with my project, and I've statically linked (dumped all the files in my directory) them to make it easier to build remotely. Here's the thing. It seems like some of my tweaks in bn_utf8_character.h got borked when I tried to make my latest build, which broke the dialogue engine.
Good news is, it's fixed! I've reuploaded the binary. If you're having the issue, just re-download the file and you're all good to go. Did you just redownload the file and you're still having issues? Well... er.. be sure to leave a comment, I'll get back to you ASAP.
Thanks guys!!