I can see no reason for the problem you are having yang, lots of people are running on XP with no problems. Is RB installed direct to the route directory, C:\Airnav
As long as RB is not running there should be no problem of copying your mylog across to anywhere you want to, another directory or even the desktop. The mylog is not saved unless the application is closed properly so if closed down due to an exception, it will not be saved.
The mylog used by the V5.00.65 installation would only show the flights you picked up during that time and if you had not updated the Navdata from the installation one it would show blanks as it is an old one requiring to be updated upon installation. We suggest before upgrading to save your mylog, photos, silhouettes etc and reuse them once the upgrade is installed.
Maybe you would be better to address your issue to
[email protected] as they have the technical expertise to resolve issues. It is very difficult to resolve an issue when we dont know what it is other than being advised it is an exception and is not being seen by other users. A copy of the eureka log from the error report would greatly assist.
V5.00.65 is the last full install but this can be upgraded to V5.00.71
I am sorry you are having problems and hope that support can assist.
Alan