Re: [WiX-users] Preventing downgrades as a launch condition

The product out there (and it has had many releases) did not set upgrade code but used a registry key in the past. So, do I not have a situation where UpgradeVersion tags would fail if I suddenly introduce them, and where I need to keep the old scheme in parallel? Specific about this product is th

Re: [WiX-users] Preventing downgrades as a launch condition

MSI sees 1.2.3.10 and 1.2.3.9 as 1.2.3 - so they appear as the same version. In order to prevent a downgrade on a 4th field change, you can rely on the (documented) fact that MSI ignores the 4th field to prevent installs where the version numbers are identical to Windows Installer. I use the follo

Re: [WiX-users] Preventing downgrades as a launch condition

The solution in the tutorial is fine. It's the way that "everybody" detects versions based on UpgradeCode, old and new to prevent downgrades and perform upgrades. You have a problem in that the 4th digit of the ProductVersion isn't used anyway in major upgrades, so your upgrades will require y