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From: John H Meyers on 19 Nov 2009 04:57
On Thu, 19 Nov 2009 02:06:47 -0600:

> [HKEY_CURRENT_USER\Software\Qualcomm]

[...]

> Offhand, it looks like the path per user is configured
> as a nested set of registry keys
> (each directory being a new level of keys)

This is a history of previously used data folders and command lines,
examined only if Eudora can't find a data folder when starting up,
after consulting its actual command line first, etc., following the logic
mentioned in detail in the "Readme.txt" file, as installed with the program.

Eudora gets its own run-time information from "INI files"
(the user's Eudora.ini, plus optional defaults in Deudora.ini,
the latter of which is installed with its program files)

Eudora does not otherwise need or use the Windows registry,
but it does create some other (HKLM,HKCR) entries
which Windows itself needs,
most of which are created during every launch;
the installer may also create something for Windows' sake,
to establish Eudora as an installed email application.

Therefore, when you move or install Eudora somewhere else,
including on other computers, you do not need to transfer
any registry entries, because your own settings are contained
entirely within your own Eudora.ini, which in turn
is normally in your main Eudora "data" folder.

If you let the installer default the "data" location
to "user app data," this permits automatic setup
of a private individual "data" folder for every different user
who has a private Windows login account.

You can still always tell Eudora to use any other folder you wish,
just by appending its path to the command line which launches Eudora
(every program-launching "shortcut" contains a command line which you can edit),
or by dragging any folder directly to the Eudora.exe program file,
or even to a shortcut which doesn't already specify a data folder path.

Even if you change your mind after installing Eudora,
about where you would like to have told it to assume its "data" file,
you do not need to reinstall -- you can just change one line
in Deudora.ini, which is installed with the program files,
in its [Settings] section, where that decision is remembered:

DataFolder=...a full path to any fixed folder...

OR

UseAppData=1

The latter is, of course, how "use app data" is remembered,
and note once again, that the Registry has nothing to do with this.

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