TO Default :
I have installed XFCE beta edition of daryna and found that the Menu is not responding when i click on it
I had tested Mint XFCE beta Daryna and it don't have any problems with the Menu. Also, I had talked may times to the maintainer (Merwliz79) and he did not told me anything about Menu erros.
So, why don't try to check the MD5 of the ISO:
It's 682MB zise.
After that, if the md5 match, so you need to burn again the iso file, but in the slowest speed: 8x
Now, try again the instalation.
Remember that it is on beta stage, so maybe you could wait to Merlwiz79 come back and finish the Stable edition.
He will come back on December.