TLR 64 bit software

I would just install Virtual Box (free) on your 64-bit PC and then you can install XP in the virtual machine. I have successfully done this to enable me to run old versions of software.

The new BUDS 4.0.0 software runs natively in Windows 32 or 64 bit and supports the 914 TCU but you have to have a TCU version 4.6. Not sure that helps if you have 4.3 or 4.5.