i just noticed store is gone and my userman is error

where is store gone to?

[admin@mikrotik] > /store
bad command name store (line 1 column 2)

userman is also error

[admin@mikrotik] > tool user-manager database print

database is not acceseble, yet
[admin@mikrotik] > /tool user-manager database print

database is not acceseble, yet
[admin@mikrotik] > /tool user-manager database rebuild
Can take a while. Console may not respond while in progress. Rebuild user-manager 
database? [y/N]: 
y
Rebuilding user-manager database
File does not exist!

any idea how to fix this? i can’t check what is going on with userman database since store can’t be opened anymore, i dunno since what version.

i hate to do this, but it happens again, i answer my own question. i know now since when /store doesn’t work anymore.
6.20 (2014-Oct-01 10:06) changelog says:

*) stores are replaced with folders and disks are now managed under /disk menu;

ok. 1 question solved, but i still dunno how to fix the userman. i tried to manually copy sql files from other mikrotik, still doesn’t work at all.