Unfortunately, I also got into this situation. Almost all the work is done in the TT8 the hamburger is broken. Urgent requirements at work, the manager scolds me for the deadlines. I decided to go back to the TT7 version and started the whole project from scratch and delay the submission to the competition.
That sadly I can’t prove anything to the boss, since the program was bought for personal funds.
It is unpleasant.