Rename file ihc.dll to ihc.xex
Decrypt: xextool -e d -c b -o ihc-decompress.xex ihc.xex
Edit file ihc-decompress.xex with HxD
Encrypt: xextool -e e -c c -o ihc.xex ihc-decompress.xex
Rename file ihc.xex to ihc.dll
XexTool HxD
Hope this help and credit to who ever needs it found
HERE