Every time you enable or disable a plugin in Rhino, you need to restart Rhino, as plugins are already loaded and working. In previous Rhino versions, there was a message that informs you about that, but they re-implement the PlugIn Manager UI for Rhino 6 and it seems they forgot to include this message.
Please, try again restarting Rhino. I highly doubt you’ll get the “Regenerating graphics…” message when VisualARQ is not loaded.
Anyway, it seems there is a problem when you’re applying your fillet to the curves. Maybe there are other objects that were created with these curves and you had Record History set to on. I’ll need to check the file, but as Ramon has pointed out, we don’t have a Box account (Box accounts for business are not free, and we cannot afford to subscribe to all possible sharing services our users have).
Preferably, use DropBox or WeTransfer.