I tried this map (the unlocked img) in my LM55, where all others unlocked map didn't work, and it WORKS! Great news.
It seems that someone has found how to bypass the new locking mechanism.
Yeah! I tried the earlier version and it didn't work, not this one; thanks for the reply.
3490 ASR files
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Driveluxe 50LMTHD, Nuvi 2589LMT; Etrex 30x; Oregon 600
Someone will release the Brazil file???