This part here kinda makes me hesitate. If my assumption is correct, the "fully configurable" version is, paid.
Don't get me wrong, I like it. However, I don't see much improvements over other previously released Launchers, other than the Profile Switch / Save. And I'm pretty sure most RO players keep the username part, and type their passwords rather quickly, rendering this feature kind of redundant. Now if it had functions like built-in patcher, file integrity checker (download the file with mismatched crc), and 1 click Log sending of the player's OS / installation folder / dependencies / grf files read / etc for debugging purposes, then it would be nice. (I saw these on the server NeoMind and Ossi built)
PS: I feel bad, seeing as it is still a Project in Progress, please take my opinions above as suggestions to further improve your product.