I didn't program it so no, no backdoors built in. I've done something similar to flash applications I've done in the past....have a blocker that pops up after a certain date unless I disable it
I designed the application for a company for a third party. I can't/won't sue the third party since they paid for the application to be built. It's the company I freelanced for that's not paying and giving out my share. A lot of the contract was oral but I have email chains and chat logs talking about getting paid. It's just not enough money to hire an attorney for :/ Sounds like I may be SOL.