This is not a specific Crossover issue but there is a workaround.
The application installs successfully but Native Access has a problem where the application will get stuck on the update process when started. I was able to circumvent the issue by disabling the application from accessing the internet (disconnect, block), then retrying the connection after enabling the internet access. This will get you to the main Native Access window and allow you to download and install Native Instrument Software.
Native Access installs software by downloading an ISO image, mounting it and running the installer. Currently the program will fail the install and you will have to manually install the software (track down ISO files that are downloaded (typically in the bottle "Download" folder), mount them and run the installer). After manually installing, Native Access will recognize the software next time it is ran and you will be able to register your software.