From release notes:

This is an important bug fix release. It corrects the problem of excess CPU%
usage on many h/w platforms.

Version 4.1.03

2019-04-21 David Freese <w1hkj@bellsouth.net>

a6923d1: wf updates
377a7fa: WinKeyer emulators
53a06da: New install macros
9a0124d: MACRO <MODEM:
807401e: OS X build