install GTK+ driver for bear [R for BE/BA]
I have tried to install GTK+ driver on Windows like what you did with no luck. It did not work at all. GTK+ driver on Windows seems provided by the developer (package gWidgets & gWidgets2) himself. It is kind of out of date (2014 or earlier?) and looks ugly a little bit when compared to that in Linux. But it works anyway.
All the best,
bear v2.8.3-2:- created by Hsin-ya Lee & Yung-jin Lee
Kaohsiung, Taiwan http://pkpd.kmu.edu.tw/bear
Download link (updated) -> here