It's worth looking at what the research actually involved and established - this Guardian article seems to sum it up quite well:
The study was done on a group of women who were all already in treatment for "sexual dysfunction". It found that levels of testosterone, which can be involved in sexual desire (but is far from the only factor), were much lower in women on the pill, and that they were still low 4 months after women had quit the pill, even though they were returning to normal.
This is very far from showing a permanent effect on hormones (in fact, since hormone levels seemed to be returning to normal, the opposite seems to be true), let alone sexual desire.
And it doesn't say anything about whether women on the pill were much more likely to experience "sexual dysfunction" than women not on the pill.
It seems to be generally acknowledged that this can be a possible side-effect of the pill for some women, but if you're not experiencing this problem, then the research doesn't in any way dictate that you will.