PyInstaller build

couple more bugfixes and also a little refactoring #59

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Run time

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Job	Run time
build_ubuntu_20_04	1m 44s
build_ubuntu_22_04	1m 42s
build_macos64	4m 48s
build_win32	3m 14s
build_win64	3m 11s
build_win64_py311	1m 56s
	16m 35s