Create your own packed file using MEW and then practice dumping it using x64dbg.
How to dump original PE file and rebuild IAT tableHow to dump original PE file and rebuild IAT table
How to dump original PE file and rebuild IAT table How to extract original PE file from a file packed with exeExpressor protector and subsequently how to fix the IAT
How to modify dialog captions using Resource HackerHow to modify dialog captions using Resource Hacker
If you want to modify dialog box captions you should not use exeScope. It is outdated as it was written in 2004. Intead use the more current program called Resource
Step through (F8) until your nag appears. Check if there is a suitable Jump before it and if it can bypass the Nag. Also, check if you are in User