The Pro version has no problem. Alternatively, the fdroid version works as well, though it might be annoying to those who want cloud integration because the fdroid version doesn't have cloud integration.
Comics stored on a users desktop can be wirelessly synced to their Android device, making for a very convenient way to get portions of a users collection ready to be read on the go.
It doesn't add the "right" color (it uses an algorithm to replace 4 shades of grey with 4 earth-tones), but it makes B&W comics a little more interesting.
The program suggests you convert CBR to CBZ but it's not necessary. You can view CBR files without the conversion. There is an option to turn off the nag.