How to search for a registry value on the target system
InstallMate does not have an explicit search action for registry keys or values on the target system during installation. However, you can use symbolic expressions such as <@...regpath...> to check for the presence of a value. For example:
<@<HKLM>\Software\Microsoft\Windows\CurrentVersion\ProductId>
...retrieves that value. To retrieve the unnamed (default) value, end the path with a backslash, immediately before the closing '>', as in:
<@<HKLM>\Microsoft\Windows\CurrentVersion\App Paths\Tin.exe\>