I download C6000 Code Generation Tools v6.1.22 from https://www-a.ti.com/downloads/sds_support/TICodegenerationTools/download.htm.
The install file is ti_cgt_c6000_6.1.22_setup_win32.exe of size 67,407,616 bytes.
After installation, it is not registered in component manager. The size of register file (compiler.reg) is found be zero.
C6000 Code Generation Tools v6.1.21 installation is ok.