Clear-Com legacy Matrix + (and Drake 4000 Cmapsi) (and RCS-2700 RCS-WIN) users have the following options to continue to use this software on Windows 7, 8 or 10 64 bit platforms:

Windows XP programs on Windows 7:
Using Windows XP Mode, you can run programs that were designed for Windows XP on computers running Windows 7 Professional, Enterprise, or Ultimate editions.
Windows XP Mode works in two ways—both as a virtual operating system and as a way to open programs within Windows 7. It runs in a separate window on the Windows 7 desktop, much like a program, except it's a fully-functional, fully-licensed version of Windows XP. In Windows XP Mode, you can access your physical computer's CD/DVD drive, install programs, save files, and perform other tasks as if you were using a computer running Windows XP.
When you install a program in Windows XP Mode, the program appears in both the Windows XP Mode list of programs and in the Windows 7 list of programs, so you can open the program directly from Windows 7.

Windows XP programs on Windows 8:
Windows XP mode isn’t available on Windows 8, but you can reproduce it pretty closely with VMware Player. You could also use VirtualBox or another virtual machine solutions, like the Hyper-V virtualization feature included with Windows 8. However, VMware Player offers Windows XP-mode-like integration features — you can create direct shortcuts to Windows XP applications and have unique taskbar icons for each virtualized program.
Windows 8 doesn’t include a licensed copy of Windows XP, so you’ll need a copy of Windows XP to set this up. If you have an old Windows XP disc lying around, it will do. VMware Player is completely free. Unlike Windows XP mode, which was only available for Professional, Ultimate, and Enterprise editions of Windows 7, you can set this up on any edition of Windows 8.
Note that VMware Player is only free for home users, so you may want to use VirtualBox or upgrade to the paid VMware Workstation if you need Windows XP Mode for business purposes.

Windows XP programs on Windows 10:
Any application that only worked on Windows XP and broke in the upgrade to Windows 7 also won’t work on Windows 10 — don’t expect it to. The Professional versions of Windows 10 don’t offer the “XP Mode” feature Microsoft offered in Windows 7. If you absolutely do depend on Windows XP software that doesn’t run properly on Windows 7 or newer versions of Windows, you can set up your own Windows XP virtual machine.