I did see that once..but it requires that yu install Microsoft's  .Net framework and I didn't want it on my pc.   I was thinking earlier versions didn't require that..but can't remember for sure.
You used to be able to just change the extension of the brush file..but not anymore..   :(

 

“For those who believe, no proof is necessary. For those who don't believe, no proof is possible.”

[Stuart Chase]