According to the Sinex file, the program automatically selects the IGS site in a given area and gives the URL download link.

Pre3DCIT
Pre3DCIT\Pre3DCIT
Pre3DCIT\Pre3DCIT\FtpDownload.h
Pre3DCIT\Pre3DCIT\Pre3DCIT.aps
Pre3DCIT\Pre3DCIT\Pre3DCIT.cpp
Pre3DCIT\Pre3DCIT\Pre3DCIT.h
Pre3DCIT\Pre3DCIT\Pre3DCIT.rc
Pre3DCIT\Pre3DCIT\Pre3DCITDlg.cpp
Pre3DCIT\Pre3DCIT\Pre3DCITDlg.h
Pre3DCIT\Pre3DCIT\ReadMe.txt
Pre3DCIT\Pre3DCIT\SNXFile.cpp
Pre3DCIT\Pre3DCIT\SNXFile.h
Pre3DCIT\Pre3DCIT\StringConvert.cpp
Pre3DCIT\Pre3DCIT\StringConvert.h
Pre3DCIT\Pre3DCIT\URLFile.cpp
Pre3DCIT\Pre3DCIT\URLFile.h
Pre3DCIT\Pre3DCIT\res
Pre3DCIT\Pre3DCIT\res\Pre3DCIT.ico
Pre3DCIT\Pre3DCIT\res\Pre3DCIT.rc2
Pre3DCIT\Pre3DCIT\resource.h
Pre3DCIT\Pre3DCIT\stdafx.cpp
Pre3DCIT\Pre3DCIT\stdafx.h
Pre3DCIT\Pre3DCIT\targetver.h
Pre3DCIT\Pre3DCIT.sln
Pre3DCIT\Pre3DCIT.v12.suo

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