There is a long-standing bug in the installer. At the end of the install it gives you the option of viewing the release notes. If you select this, it fails because the name of the file on my system is :
"F:\Program Files\JpSoft\TCMD12x64\readme.txt"
not
F:\Program Files\JpSoft\TCMD12x64\readme.txt
"F:\Program Files\JpSoft\TCMD12x64\readme.txt"
not
F:\Program Files\JpSoft\TCMD12x64\readme.txt