Hi,
Sorry about this, after some tests, particularly with your tip of the slow settings I found that this seems related to the Windows Real Time Protection feature and the way Twistpad saves its settings, but it seems to only happens sometimes.
I was able to, apparently, fix this issue. Just released Twistpad 3.15 beta 1 (in the registered user's area) can you give it a go? Just unzip the folder and try to change settings, opening files, etc, and let me know how it went.
Thanks,
André SantosCarthago Software Support
https://www.carthagosoft.net