I would do a little investigation first to see if the company policy HAS changed, before bringing it up with your bosses or anyone.
There should be a way to get your most recent contract, and to read it over to see if there's anything forbidding what you're doing right now.
If there isn't, then you can bring up the idea to your bosses, but I would be cautious about bringing up what you've been doing directly - you WERE going behind their backs and doing something that they didn't want you to do, so there is reason to be concerned. Assess their reaction, and find out first if there would be any backlash if you were to try to do the same thing today.
From there, it's up to you whether or not you tell them what you've been doing - it really depends on how you feel they'll react to it, and whether or not they'd be upset at you doing this during your own personal time (which legally they shouldn't be able to prevent you from doing it, but could see it as going behind their back and retailate for it, so be VERY careful if you decide to tell them about it).