How would I parse through this to get the correct info?

[Hookeo]

I've noticed this a few times, but some people are using

Code:

./cudaHashcat64.bin

As opposed to just using:

Code:

cudaHashcat64.exe

Is there a difference?  When I try to run the ./bin one, it tells me one that ./ isn't a command, and then that it wants to open the bin file instead of running it.