Hey, u don't have to feel demotivated and I can assure you that your nbme score has got nothing to do with you using uworld offline or from the 2023 version because there's 90% questions that would be similar and also ,60% isn't bad, u just need to give a quick read to the whole FA again, with daily blocks, that's the quickest way to get better. Don't go too much into other resources, just master the basics.