I haven't made a major revision of the geometry system of Qoole, so the floating-point errors should still be present.
However, I changed the internal format to use something XML based which doesn't perform floating-point->integer conversion when saving, so its possible the number of issues will be smaller, except when exporting. Further testing and fixing is recommended.
The main priority of wxQoole was cross-platform support, in particular Windows and Linux, then a somewhat limited extensibility to be able to use it in my own projects.
Unfortunately I haven't had time to work further in wxQoole, so don't expect a soon fixing of the problems.