EchoSaysRelax

Hi! I've been working on my first Stardew Mod (I'm totally new to this) and was able to use xnb_node plus EXNB to convert the .xnb files I needed to .yml and .png to edit... but they won't convert the other way around! I have tried to run the xnb_node command without EXNB... but when I put the commans into Powershell it just tells me the command can't be run. So I used EXNB... It worked fine one way, but reversed it says "No files to convert". I went ahead and edited the batch file a little adding in a 3rd check for specifically ".yml" instead of ".yaml" and then ran it again and it said that the files were converted, but no files ever appeared in the XNB folder. What am I doing wrong? Halp!