Short answers below:
1. Are there any more themes that can be downloaded apart
from diode, tron etc?
No
2. Can the 'activity' buttons on the LCD be customised
like the ones in the favourites list?
I've read of users doing this. Not sure how to set it up.
Similarly, can the buttons you
assign to the LCD screen for a particular activity be
cusomised?
Yes, in as much as you can customize each activity.
3. Is there any way to display more than three activities
on one page on the LCD?
No
4. I don't fully understand the 'sequence' option in the
software. What does this relate to?
Sequences allow you to create a string of commands to one 'sequence'. Like a macro. For example, a sequence can be constructed to send a command to open a menu, scroll down a menu two levels, send an 'okay' to select the item.
5. Finally, and this is regarding the forum, not the remote:
is there any way to get email notifications when a reply
is received to a thread that you're interested in?
Don't know about that one.
Thanks in advance.