Here's whatsnew:
-implemented the ACIA 6551 registers at $FD00-$FD0F, which are automatically enabled for configurations with 64K or more RAM; this is not complete yet, but the basic functionality works
-video recording can also be done in RLE8 format now, which allows smaller file sizes than uncompressed YV12, at the expense of some TV emulation effects not being captured
-added new command line option for selecting the GUI style and colors
-various minor improvements and bug fixes

Get it here:
http://plus4emu.sourceforge.net/

-Trebor