What is different Full package: CASToR_v3.1.1 and Binaries only: CASToR_v3.1.1_bin

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1

Dear Sir,

What is the difference between Full package: CASToR_v3.1.1 and Binaries only: CASToR_v3.1.1_bin? Which one should I download and used for the SIMIND program using the smc2castor prompt?