www.makemkv.com

Should te current beta key work with less than a month to go or do i need to wait for the next release?
I can't seem to get it to work at the moment.

Depends on what you mean. If you are ripping Blurays, it lasts for 30 days at a time, after which you need to re-enter it to turn it on for the next 30 days (or when it expires). During that time, you will get a notice telling you how many days you have left when you start a BD.

yes it was a bd that i was going to rip but haven't used the site for a while. thanks for the info i will just wait for the new key at the end of the month.

You can re-enter the current key, which will work through the end of the month, if you wish to rip now. Not everything has to wait...