With fw.img, you should be able to run FIX94's version of ftpiiu_everywhere from HomeBrewLoader, and connect to the WiiU from your PC using an ftp-capable client like filezilla, FlashFXP, or WinSCP.wup installer by crediar hbl version 1.0 dimok
mod 1.2.1 by yardape8000
cfw booter boot a custom firmware file
fw.img
In the ftp client, navigate to the WiiU's /storage_slc/rights/ticket/apps directory. The ticket you're looking for is in 0007/00000004.tik for EUR, and 0009/00000015.tik for US.
If the size of that file is either 696 or 848 bytes, just delete it. If it's some other size, you have more than one ticket in the file and you'll have to edit it, or at least take note of what other titles are in the file.
Please reply with the file size once you've gotten to this point, and we'll take it from there.