The larger 1.6 meg exe file installs the program (only 252 k) plus data files. Always use "Section choose" rather than file open and remember to change the default subscript option "cor" to "dat" for the many available sections out there. The 252k program itself easily located on the net by searching for profile and Frankie Arzu.
The natter on the interesting PW sections here:
Of interest in the RC Group comms was the "Windfreak" thermal flying wing from the late 70's and early 80's, probably the only flying wing I read of in RC Soaring Digest in succeeding in beating the normal gas bag thermalers at the time. Really looks the part for gas bag builder like Fred Wittstock....