Hello cis-didge,
Electra2 seems to works as expected on your system.
Electra2 is 100% downward compatible with ElectraX 1.3 or higher. You are able to load your old song projects made with ElectraX with Electra2.
To maintain this downward compatibility it is necessary that file names, directory names and Plugin IDs remain the same. The directory names and file names on your system seem to be correct.
Your old projects which still load ElectraX seem to be created in 32-bit mode (ElectraX v1.2 or earlier), while the newer ones seem to use the 64 bit version which is only available from v1.3 or higher. That's why you might see the plugin twice. From the technical aspect Apple's AU plugin system handles a 32 bit and 64 version of a plugin as two 'different' plugins (which is imho a rather stupid design decision).
If everything works as expected you should not touch anything on your system. If you got technical problems please follow these instructions:
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We don't recommend that you install serveral versions of Electra at the same time, since Electra2 is downward compatible, but the old ElectraX is not upward compatible with Electra2.
In general you should never do hybrid installations of serveral versions of software, since this can lead to unexpected side effects.
To fix your hybrid installation you first should remove all ElectraX files (except the t2k keyfiles) from your system:
1) Delete Library/Audio/Plug-ins/VST/ElectraX.vst
2) Delete Library/Audio/Plug-ins/components/ElectraX.component
3) Delete Library/Audio/Plug-ins/ElectraX_sounds
3) Delete Library/Audio/Plug-ins/ElectraX_data
Then completely close your host and run the installer of the Electra2 full version. After this do a plugin rescan in your host. Now you should only see Electra2.
Best Regards,
Markus