Capture One and DNG Files

Hi, I shoot RAW (DNG) with my Phantom 3 Prof. But I can't work with these files in my payed full version Capture One Pro 9.01 64 Bit on Windows 7 64 bit. I can open it but all tweaks are not usable and I am not able to convert into JPG or TIFF.
How to deal with DNG files in Phase One? Do I really have to buy Adobe Lightroom for this kind of files?

Thanks and regards
Marc