No worries, I am having the same issue, but have not changed the Bit-ness. For clarification:
1. Client PC is Windows 7 SP1 64-bit with Lync 2013 32-bit VDI plugin installed
2. Horizon View Client on Client PC is 64-bit
3. VM is Windows 7 SP1 64-bit with Office 2013 32-bit installed.
I would need to change the Office 2013 install in the VM to be 64-bit for it to work. Is that correct?