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how can i import all macros at one time just like MA2~~
Assuming that you're trying to import your macros from an MA2 showfile into an MA3 showfile, this isn't going to work even if you do place your macros into the correct folder and attempt to import properly.
Shortcuts are expected to be expanded. Would believe this would include remote inputs and similar as well.
I can't answer regarding console update but for MA2 3.8, it is an update for MA2 in which you can now export patch as MA3 v.1 which also has some improvements. Just like a normal MA2 update.