Looks like someone hacked http://www.dopus5.org
How sad that this project is not beeing looked after for some time now. It could be a simple fix, that just disables unicode requests and ask for 8bit file lists as was done in previous versions. Strange why OS4 does not traslate unicode strings, but displays them as garbage, and crashes eventually because of this.
It is set in WBStartup+ icon in wbstarup directory. A new update is available on aminet that fixes a number of important bugs.
This is not realy a bug, but it is bug. In otherwords, the current implementation does not work with proportional fonts With fixed width font you should not have problems
This is more a locale feature, and depends on your language driver. The question is, does DO5 suport locale or does it interprit customly.
This is actually easy, basicly we need a prefs item to tick that selects either use custom requesters or use os complient requesters (these can be promoted by ReqAttavk).
Have you tried http://aminet.net/util/boot/WBStartup+UPD.lha This works fine with Opus5 via wbstart library
File size limited to 2GB