thank you so much sir.
Yes, sx has support for latest firmware. The only way to get the key without updating is to ask a friend for master_key_07
But there's not dissadvantages to update to 7.01, though you'll need lockpick rcm to get the key and for it to work is needed to update the sysnand, not just the emunand. To lockpick rcm usage refer to shchmue's thread:
https://gbatemp.net/threads/switch-7-0-key-derivation-lockpick_rcm-payload.532916
Use either lates beta from master or 0.80-c. Then activate teither option 2 or option 3 in the following screen:
View attachment 162918
Note: The option is in Global options.
Latest master:
https://github.com/julesontheroad/NSC_BUILDER/archive/Beta.zip
0.80-c:
https://github.com/julesontheroad/NSC_BUILDER/releases/tag/v0.80-c