Please help...I had mp4 and animated characters created for a wedding proposal video. He didn't complete properly. I am trying to do the editing. Missed my initial proposal date. I can't seem to get files to load

I am hoping someone may be able to help. I paid someone to create a video clip from a movie for my wedding proposal. I have been working on this for months and he delivered many files but they need tweaking. He was supposed to do this in Adobe Character Creator but used Toon Boom instead and I don’t know anything about this.

If anyone is willing to look at files and help, I would be so appreciative! Thanks for your considerations