Sorry about that. I also posted in the CustomBrushesMini thread that an update had been posted. Apart from updating the date in the plugin pack thread, is there anything else I can do to make it clear?
Since 4.0 hadn't been released when I posted the update, I made sure the plugins supported 3.5.11 as well. However, support for 3.5.11 may be dropped in the next update.
I've added a notice that the plugins should work in 4.0 and 3.5.11.