Can I change to another injury lawyer?

Yes. And you don’t even need a reason. This applies to all personal injury and workers’ compensation cases. The reason is because the attorney/client relationship is a contractual one. It is an agreement for services. But no party is ever required to stay in a contract. Therefore, the client can exit the contract at any time. The attorney can too, but if the case is in litigation, then the attorney will need permission from a judge to withdraw from the case.