Hello guys .. I have a question ... if i buy this plan (Monthly Branded) and i want it just for a month, the script that you gonna give me will be mine?i mean i can use it without buying any other plan?

Yes you have to renew month to month to keep license active if you go with the Monthly plan.
If v2.3 is released while your monthly license is active you will get that for free ( included with your license ) as well.