Antonio, When I attempted to upgrade Neo to 1.8.2, it would act like it was upgrading but then give the error message posted above. I found the answer after posting the request for help by using the search function to search a few unique words from the error message in the search box on top of each support page. For example, search “PCLZIP_ERR_BAD_FORMAT”. The answer was I needed to input the Key I got when I purchased Neo. I had added Neo to a new site and hadn’t entered the Key. So, Neo would give me the error because it didn’t know I had a legal copy. You can use Neo on multiple sites, just remember to enter your key each time you install it. Good Luck!