Ah, then you should switch to a two-button mouse ASAP. Until then, you should copy the program ShiftClick from System:Utilities/Commodities to System:WBStartup. You can just drag it to there from one folder to the other. Now it will start every time you start MorphOS. You can also just double click on the program to start it. What it does is that it let you chose what key you need to hold down to activate the right button.

If you don't want the program to show up every time, right click on the icon, choose Information, double click on (CX_POPUP=AUTO|YES|NO) to remove the "( )" and change it to "CX_POPUP=NO". And press Save. Now it will not show up every reboot.

[ Edited by Yasu 16.02.2015 - 01:32 ]