Rick Glos wrote:
We just released version
5.0 of our product. Spending
6 weeks updating our installer (we have a custom C# installer). I can
see
our new customers
instead using a
new .msi for later versions (5.5, 6.0, etc). What do I do about our
existing customers when they wish to upgrade? They’ve never
installed originally with a Windows Installer. How do I get them on
the
same track?
MSI has support for automatically upgrading other MSI installations to
later versions. You won't be able to use that with your custom
installer but you can fake it. For example, use RegistrySearch or
FileSearch to locate old installations, then provide UI that prompts
them to uninstall first.
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