Well, if you bought the mic only a month or so later, I would continue to complain, for most companies provide for a "grace" period for new/upgraded versions for free within a certain timeframe. If you just go to the website or talk to level 1 tech support, they will tow the company line about paying for upgrades, for most L1 tech support may not even know their company polices of grace periods. I would ask for a manager or sales associate, explain how much you love their product on your older machine but that you have a newer work machine now that you did not know about earlier, and had you known of both your upgrade and the upcoming product upgrade you would have waited, and offer to pay for shipping.
The most important thing about these issues is be firm with your request, be polite and courteous and positive about the company and their product, and keep asking for a higher level manager until you get what you want. Make sure you have a good story, but no company wants bad vibes or reputation. Give numerous examples of other similar products or software that have provided you a similar free upgrade and keep pressing them, trust me, I've gotten costly upgrades for free numerous times wthin that 30-45 day window, you just need to find the right person to talk to.
Good luck.
