New tickets being generated are anywhere from 830 - 840 bytes with bad info in them. Correct generation is 848 bytes.

I assume this is because of bad fetching when it comes to the library as I've put in some debug statements to print the information it's fetching. Oftentimes no title key is returned, or it just straight up gives the wrong information.

I'll work on a fix for it.

I can verify this by checking the manual download links and visiting them via the browser. Getting the TMD and as an example for Minecraft Wii U Edition the link is http://ccs.cdn.c.shop.nintendowifi.net/ccs/download/0005000E101D9D00/tmd. This provides a valid download, and by matching it with an existing TMD from the game's update, it's a match down to the hex. You can further verify this by trying both the Base and Update link which will yield different file sizes.

Your software can actually be modified to download updates VERY easily.

By removing the lines below

if tid[4:8] not in app_categories:
    base = sysbase
    os.system('rmdir ' + tid +'/')
    print('Downloading updates is currently unavalible')
    sys.exit(1)

(didn't look at the entirety of your code, so not sure how badly this breaks things. While there's no errors, can't be 100% sure it doesn't mess with your program logic)

It immediately jumps forward and starts downloading the proper game update files. However I can see why you'd want to keep the section for stability and whatnot. It can be changed to accommodate the update structure as well.