Major Description
The behaviour of option processing for multi-valued registry entries is partly undocumented, and inconsistent.
--Option and ++Option are only documented in the context of a single invocation of procrun.
The documentation should be updated to clarify that ++Option can be used in a separate invocation of procrun (update service) to append values to the registry.
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The documentation implies that --Option resets the value.
This is only true if the ++Option is not used at the same time - if the ++Option is used anywhere on the command-line, then all the options are appended to any existing value in the registry.
The behaviour of mixed --Option and ++Option should either be fixed so that --Option clears any existing settings, or the existing behaviour should be documented.