The evaluation version has limitations to get people to purchase the product.
If you believe you have the full version, you probably need to enter a license key somewhere to unlock it.
If you don't have a key, you must get one from your employer/school/whoever has you using it, purchase one, or pick a different IDE.
If you believe your code size to be under 2k, there might be something else wrong. Or the debugger might also be disabled in the evaluation version. Look up exactly what the limitations of the evaluation version are.
Good luck!