Hey, sorry to hear about the issues.

Unfortunately the plugin is not resizable.

Regarding presets: just to confirm, you're looking for presets in the plugin's preset bar, not in the Reaper menu bar? Eventide plugin use a custom preset system and thus would not show in the Reaper menu bar. And the folder on your PC that you're checking is C:Users<username>DocumentsEventideH949 Harmonizer?

If you've checked those and still have no luck, please email support@eventide.com and we can get you the preset files another way.