Yes, the 30-day 'KickStart" evaluation version is a Full version of IAR that is required to compile the Large BLE projects. Any version of IAR above 7.51 are recommended for use with BLE. With the lower version there are updates/patches that can be applied. I believe version 8.10 and higher didn't require any patches.
I don't know the reason why there would be no mention of having to purchase the compiler because it is the ONLY method for compiling the BLE library files. You can us another compiler if you only want to use generic 8051routines.
The learning curve is very steep, but there are plenty of examples. There are also plenty of question from frustrated beginners (I was one of them!). I should have suggested you go through the literature and software examples on the other version of IAR before you downloaded the 30-day trial. You would have at least been able to get a feel for environment without the pressure having the license expire.
If this is your first exposure to Bluetooth and BLE then I highly recommend you down load the "QuickStartKit" version 2 from http://developer.bluetooth.org/DevelopmentResources/Pages/Quick-Start-Kit.aspx. That along with reading the documents in the BLE v1.3 folder are essential if you move quickly into developing your own applications.
Thanks