Can't install draftsight - "Specified path is too long"

I have downloaded Draftsight for Windows 8 64-bit, my operating system, but every time I try to install the error message appears:

 "Error 1320.  The specified path is too long

C:/ProgramData/Application Data/Dassault Systemes"

 

there is an option to retry, but I get the same error message.  Only other option is to cancel.

Any ideas anyone??   Phoned helpdesk, and was just put on hold for ages.  Emailed support, they told me to come here.

 

LMK what I can do.