Eval. period expired

[szanet]

Hello
I am receiving the following error when I attempt to make a MKV file from a Blu-ray, any suggestions?
"evaluation period has expired. Please purchase an activation key......"

[Woodstock]

You can reset the 30-day evaluation period for Bluray features by re-entering the beta key, which is always found here: http://makemkv.com/forum2/viewtopic.php?f=5&t=1053

Recently, there have been reports that this does not always work, though.