Problem

RAM Concept has been removed from the Control Panel but the installation for the 64-bit version will not start; is says the "32-bit version is already installed".

There are no folders for RAM Concept in C:\Program Files (x86).Structural System

Solution

The installer thinks that 6.0.0 is installed because the product ID appears in the registry.

Try explicitly uninstalling via the product id, like this:

               msiexec /x {994F8172-432E-4756-857A-0B4066B138C6}


If the bundle still won't install, we need to modify the registry. 

Run regedit.exe, look for the following key

               HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall

Rename the {994F8172-432E-4756-857A-0B4066B138C6} to xxx-{994F8172-432E-4756-857A-0B4066B138C6}, or something similar. Once, this has been successfully done, run the installation file again.

In case, the specific product ID is not present, download the 32-bit version of the program and install it. The installation will run fine. Once it is done, you can keep using it or uninstall it and install the 64-bit version of the program.

P.S. If you are not comfortable in updating the registry, please get help from your IT department.