Ok, ill explain once more alright? here i go.
Since you have already installed HBC, you need to install CIOS 249 and 250, since they were stubbed when updating. now, you dont need to use letterbomb nor wilbrand since those were the entry points to install HBC but you already got it.
Now, you need to install ModMii on your PC:
https://sourceforge.net/projects/modmii/files/ModMii Installer.exe/download?use_mirror=superb-dca2
And you need to install Syscheck on your Wii:
http://www.hacksden.com/downloads.php?do=file&id=149
On your SD Card extract the folder from Syscheck so the path would be SD:/Apps/SysCheck2/boot.dol create the path if possible or just drop the folder on the path that i mentioned.
Once this is done, insert the SD on the Wii, go to HBC, and launch Syscheck, it will ask to what to check, select ALL, it will read all the IOS, it will generate a report on the SD called SysCheck.cvs.
Copy the SysCheck.cvs file to your desktop, and open ModMii, the console Based one, don't use the GUI version. once the console opens write I Agree, then Write SU.
Drag and Drop the SysCheck.cvs to the console, and it will generate a list of files that will download and everything needed to install it.
Select Download.
And you will have a folder with som files, COPY EVERYTHING to your SD, insert it into your wii, and open HBC again.
This Time open MultiModManager or MMM depending on what appears on the screen, once inside, press the RIGHT DPAD, and select INSTALL ALL WADS, and there you go. Wii Softmod Updated. ;D