[winGRASS] Starting problem of win grass

[Marvin Ma]

Dear all

I have a problem of starting up win grass after the installation

[: Ma/.grassrc5 unkown operand
ERROR: usage: /usr/local/grass5/etc/lock file pid
Marvin Ma is currently running GRASS. Concurrent use not allowed
please notify system personel

This should due to the problem of having a space in my windows login name, right?
I have read the old post that I may solve the problem by setting the path of home
But may I know how may I set the home to another path?
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