I have been using LockXLS and recently it has caused my application to
malfunction.

I also tried a demo of DonEx and the application runs VERY slowly.

Can you please advise RE other solutions that will provide some degree of
protection and hardware locking?

Any sample code sources that can help secure this app based on MAC address,
CPU ID/SN or Win/Reg key would be appreciated.

Also, any other approaches to this problem would be helpful

Thanks,