I have downloaded the setup file, but when I click on it, I get an error message saying “Internal error B109-11 Cannot decompress setup program”. What should I do?

Usually, it means that the setup file was not downloaded completely or was corrupted during the download. To fix this problem, please delete the bad setup file and re-download it again. If you already purchased QuickInvoice, please visit this page to learn how you can download your Full version setup file again.