It could be me, but when I try to install Version 7.00 Personal Edition on a Windows 7 machine, the setup program doesn't let me change the install directory.
Even though I can browse for the folder I want C:\FTN95 or type it in, the install always goes in C:\Program Files (x86)\Silverfrost\FTN95.
As you know, this can cause some issues with SDBG options and window sizes not being kept.