introduce myself

dear forum members,
i am a novice of this forum. i downloaded a software AB 5.10 standard edition.
and using last five months i downloaded data from sites and uploaded into my AB. but unfortunately last one month i can uploaded data can't save into database.a message (Please register Amibroker!...Database saving is disabled) is generated while i run AB.
Please help me... i beg comments for this problem from all experts and forum members.

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