I don't seem to be having any luck with this. :/
I've uploaded the files (I tried both uploading through Vera's webserver as well as using WinSCP) and it appears that there are duplicate files. When I use WinSCP I can see that at least one of the two files I've uploaded is a lua file, but the one on the Vera is an lzo (Some type of compression, I take it). Restarting the engine and rebooting have not helped -- I still don't see the TTS engine in my drop-down list.
Are there any steps that I've left out?
Thanks in advance.
Edit: duplicates seem to have disappeared. Still no drop-down.
Edit 2: Ok, that's just really weird... waited 10 to 15 minutes, made no changes, I see it in my drop-down list now.

Sorry for the false alarm and thanks for the modification to the plugin!