Hi arcnor, welcome to the forum
Glad to have done my bit to help, hopefully I haven't set you up for a dissapointment. If so, I'll try to share the blame!
Looking back through my archive, I've used it with software versions since 1.0.4 (the released versions have been 1.0.4, 1.0.8, 1.0.11 and 1.0.23). I've still not seem 1.0.24 on the website either, so no idea what improvement they might have added on the most recent CD version. I'm currently running 1.0.23 and haven't found any bugs in it as yet.
As you've probably noticed, Owon are hopeless at doing release notes, there are also some big gaps in the released numbers, meaning that there must have been a lot of internal versions in between.
In terms of changes, it hindsight it's difficult to remember them in detail, I think they have mostly been bugfixes. There was a problem in 1.0.4 with single shot triggering I think, fixed in 1.0.8. I do remember that 1.0.8 added the ability to maximise the window, however it also introduced a bug which made one of the settings windows very slow to open (for me anyway), this got fixed in 1.0.11. I think at some point SCPI support possibly got included too, but I may not have noticed it previously. Another thing that has probably changed is inclusion of newer scopes like the VDS1062. Although there are different releases for different scopes, I think this is because they include different downloadable firmware for the different hardware platforms, hopefully they are now all using the same PC s/w code by now.
Having a full-time Java programmer on board could be very useful. As Owon seem to have managed to accidentally include the source code in their releases there are probably all sorts of useful tweaks that could be made. A few more shortcuts would be useful for instance... and the other big one, adding single shot triggering at slow (chart recorder mode) timebases - that one is probably tied up in firmware though.
Do please report back on your impressions after it arrives and anything useful you dig up in the code.
P.S. You might be able to help with the porting to Linux too, is sounds as if it very nearly works.