So my dad bought this program: http://dslrbooth.com/ will I be able to run it on the raspberry pi 2 b+ running windows 10, the main reason i ask this is because last time we did this we used my Microsoft surface pro 2 and it overheated (from being in the sun, plus it is pure black which didn't help it staying cool) and melted the CPU
You won't be able to run dslrBooth on the Raspberry Pi. While MS is in fact releasing an ARM 7 variant of Windows 10, the software it runs will still need to compiled for the ARM 7 architecture. dslrBooth has states on it's requirement page that it requires Direct X 9 to run, and since it doesn't specify any systems that have an ARM processor for the core application, I'm assuming it requires an x86 processor as well.
You will not be able to run any Windows specific software on a B+ because there will never be a version of Windows for the B+.
The A, B, A+, and B+ models use an ARMv6 processor. The Pi 2 is different from these in that it uses an ARMv7 processor. ARMv7 is much more common as it is widely used on mobile phones, etc., hence it is not a great stretch for MS to release a version for the Pi 2 only, although they have not done so yet.
If you are thinking of buying a pi for a purpose requiring Windows, I would wait until it is released to see if what you want to do is feasible, since it may not have all the features of the regular version.
No, you cannot. In addition to being a different architecture, there is no GUI in the RasPi Win10. It's pretty much just a shell. Any program that needs the GUI (e.g: Office, and probably DSLRBOOTH) cannot run.