This is a file library, you will need to download and install the Boss Tone Studio software to use the patches.
THERE IS A SPECIAL LIBRARY FOR MKII PATCHES AT:
https://guitarpatches.com/patches.php?unit=KATANAMKII
2019-08-29
2019-10-01
2019-11-16
2020-02-15
2020-08-07
2021-04-21
2021-10-07
2022-11-01