Take a look, if you can, at
http://doc.qt.io/qt-5/qfileinfo.html
and in that page search for “QString QFileInfo::absoluteFilePath() const” (no quotes of course): it’s the method used by Fritzing to get a bin’s path; it says that the absoluteFilePath() methos on windows always capitalize the drive letter; since Fritzing uses the QTString::compare(…) method with no case sensitivity parameter specified, the two paths it compares are different.
I don’t understand why other people are not having the issue
Giovanni Romeo