Also, which operating system?
and which version of Lightroom?
Mac OS X yosemite
The plugin is from Animoto
is the plugin enabled?
Do you only have the problem with Animoto, not other export plugins?
Are we sure Animoto's plugin is an export plugin?
Did you look in the 'Export To' dropdown list?
If problem is only with Animoto, consider contacting them.
Sorry I haven't been more help.
Aha!! It's under the "Export To" dropdown list!!!!
Thank you so much!!!! (I feel a little silly for not seeing that, but oh well...)