Decompile and Unlock a mql4 file

Hi, I recently purchased an expert advisor that unfortunately has a strict limitation on the account number, meaning that every time I have to test it on a new demo I have to communicate to the seller the new account number where I intend to use it. The problem is that, I don’t know why, in addition to having to wait one or two days for a response, often, after the activation of an account, the expert doesn’t work yet. After three or four times, my patience is over. As the expert is my property now that I paid (and not cheap), I wonder if there is someone able to decompile the ex4 to mql4 and unlock the expert so I can use it on all the demo i want. The expert is only a file .ex4 without dll.