It is safe? I mean, there's no problem for doing this?
Other thing that I noted is there's no longer exists DOPUS64.exe in the Dopus Folder, but still remains the old DOPUS64.exe from Dopus 9. It can be removed right?
Yes, it's fine. (Couple of other threads about this from yesterday if you want more details, but the answer is it's fine.)
Do you mean DOpusx64.exe?
DId you reboot after updating?
[quote="leo"]
DId you reboot after updating?[/quote]
Yeah, I do. And the Dopusx64 from the Dopus 9 still in the folder. But I have no problems so I erase it.
Thanks for answer so soon Leo.
And other thing, why Dopus 10 doesn't have Spanish language? Do you know something about that?
The Opus 10 installer should have deleted dopusx64.exe but if it didn't for some reason it's fine to delete it. (I checked my machine that was updated from 9 to 10 and the file was deleted okay in my case at least.)
I'm guessing the Spanish translation wasn't finished in time for the first release.
My Doupus64 wasn't deleted either
Unfortunately the translator was not able to finish it in time and we decided that only 100% translations should be in the release. I've thought about that today and decided to release the Spanish language library even though it has only 92% translated. Hopefully the Spanish translator will be able to be encouraged to finish it:)
I've updated the InstallShield build so please just redownloaod and reinstall.
For reference the new IS build available now includes the Czech language as well (which somehow I forgot to include in the build in all the excitement! 
)