It will probably not solve your problem but i recomend you to upgrade to the latest runinuae anyway simply because it has some new features.
It can be downloaded from here:
http://www.zen75819.zen.co.uk/Temp/RunInUAE_r8-beta4.lhaNow when i think about it might solve your problem anyway, iirc it will ask you about what to do with your old installation when launching it.
