Did you use Decrypt9 to decrypt your CIA? (deep).
Follow
this guide it might be easier to understand.
Mostly it crashes after you try to install and you have to reboot anyway.
But in case you get an "already exists" error or something along those lines and you know for sure it messed up, then simply install the default home menu and restart.
Alternatively you can use GodMode9 to back up the HomeMenu from the NAND (simply copy it on a folder on your SD. tmd, content and the cmd file).
And if you brick you launch GodMode9 and copy these files back.
You can also use
this tool to simply rebuild one Home Menu without any changes and then install that if you get errors using a default menu.
(The tool is awesome. Use it

)
Since I haven't really shared anything yet (and people may think I don't know what I am talking about)
Here is something I have done:
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