weleh sy baru aja upgrade ke ver 4.0(x86), hasilnya.... apes
setelah upgrade ada chit2, sbb

mesti update key <72jam, else jadi trial)
The upgrade to new format key is free of charge, and can be done
automatically right now in Winbox.
Please click on "Update license Key" button in the System License menu to
get the new key (your Windows computer needs to be connected to Internet).
If you do not update the key, this RouterOS installation will expire in
71h48m, and will require a complete reinstall.
Please press "Enter" to continue!
[admin@MikroTik] /system license>
pr
software-id: "0NOC-DFJD"
old-software-id: "YHSM-UMG"
expires-in: 2d23h47m43s
terpaksa di downgrade ke 3.30 lagee... ribet! lagian belum butuh 802.11n
upgrade v4.0 untuk x86, don't try it at home!