Freezes when tryin to delete

[davebarnes]

1. I rebooted my iMac.
2. Launched MaxBulk Mailer.
3. Added 85K email addresses to Recipients.
4. Dragged a file named DELETE (with 17K email addresses) to MBM.

Now MBM says "Removing address from file "DELETE"", but the progress bar is frozen.
When I right-click on MBM in the Dock, it shows "Application Not Responding".

What have I done wrong?
How do I fix this?

 

[davebarnes]

Appears to fix itself

After 40 minutes, it unfroze and has removed 384 addresses.

So, did not freeze, just appeared to freeze.

 

[stanbusk]

Yes, that's a quite intensive task.