Hi,
thanks for your review, and sorry for the trouble.
Can you maybe provide some more information on this? Where exactly is the plugin slow? I assume that you are referring to the “Edit” screen of a table? If so, how big is that table (rows/columns)? Very large tables can indeed cause such issues, as most browsers have trouble managing a large number of text fields efficiently. You could then maybe try a different browser (the current iE versions (surprisingly) work best, as far as I have heard).
Or are you experiencing the slowness somewhere else? I’ll happily try to help here, so that you can maybe give TablePress a second chance!
Regards,
Tobias