Azu - you've been a member of the forums for 6 years! I'm assuming you've used the free version of C2 in that time so you know how good it is. Surely you could have set aside a small amount each week/month to save up to buy a C2 license.
The personal license is quite cheap, I doubt you'll find a cheaper alternative game development tool as good as C2 -
If you really can't afford it but have a game idea for which you need the license, then ask family and friends for help or try crowdfunding - Kickstarter, IndieGoGo, etc. -