I was able to install ProjectLibre version 1.6.2 into my Laptop having Windows 10 OS last Aug 13, 2016. But started learning how to use it just now and I noticed that there is a new version 1.7 that is available and tried to update to the latest one. The installation however, was not successful and says that it encountered an unexpected error, It further says that this may indicate a problem with the package and two error codes was displayed; error code 2503 and 2502. I was thinking that this must be probably because of the old version which was not uninstalled before installing the new one so I tried uninstalling the old but it wont uninstall stating the same error codes 2503 and 2502.

Thank you very much for your help.