Given that the RR database is correct, (I have discovered on ocassion it is not - like still missing a change such as a system rebanding), then yes, you just click import channels and you are good.
Sorry, I should note that the RR rebanding error was quickly fixed once it was reported.
But, I did have to do a bit of exploring as to why I wasn't hearing anything when using the imported data 'as is'.
I ended up looking at/verifying everything and when I looked at the site options, I finally noticed the trunking tables were not right. I manually fixed them and reported it to RR.
It was fixed within a day on the website, but remember that it won't show up immediately in the library. I think it's updated weekly.