Having got past my initial problem of not being able to see the map (installed Oracle version of Java to solve that), now in 2.21 under KDE Neon clicking on Extras > Options doesn't bring up the options screen. This happens on both the online and offline versions of RC.
Running RC from terminal shows the lines:
Oct 04, 2017 10:14:04 AM slash.navigation.gui.SimpleDialog restoreLocation
INFO: Dialog size is java.awt.Dimension[width=0,height=0]
Oct 04, 2017 10:14:04 AM slash.navigation.gui.SimpleDialog restoreLocation
INFO: Dialog options location is java.awt.Point[x=745,y=435]
Oddly the problem doesn't exist when I run version 2.19.
Running RC from terminal shows the lines:
Oct 04, 2017 10:14:04 AM slash.navigation.gui.SimpleDialog restoreLocation
INFO: Dialog size is java.awt.Dimension[width=0,height=0]
Oct 04, 2017 10:14:04 AM slash.navigation.gui.SimpleDialog restoreLocation
INFO: Dialog options location is java.awt.Point[x=745,y=435]
Oddly the problem doesn't exist when I run version 2.19.
