Sansa Clip+ Firmware Update 01.02.16

I have is Clip+ with Version 01.01.05 and a Macintosh computer. 

I downloaded the updater (by clicking “Download Sansa Firmware Updater” link) and it is an exe file, not a zip.  So how do I extract the zip?  When I click on the file it asks me to choose an application to open it.

Also, I have followed the instructions several times for changing the mode to MSC and it doesn’t work.  It stays in USB.