WP-Newsletter Activation Causes Wampserver to Crash

Having paid for wp-newsletter, I’ve just spent three hours trying to get it to activate from the WordPress admin panel. When I first tried, I simply got a 404 error page and a Microsoft Windows (I’m on Vista 32bit Ultimate using Wampserver 2.0i) notification that Apache had crashed with the following details:

Problem signature:
Problem Event Name: APPCRASH
Application Name: httpd.exe
Application Version:
Application Timestamp: 493f5d44
Fault Module Name: php_mysql.dll
Fault Module Version:
Fault Module Timestamp: 4a492311
Exception Code: c0000005
Exception Offset: 00004a2a
OS Version: 6.0.6001.
Locale ID: 2057
Additional Information 1: c7db
Additional Information 2: ae42b9a901477bc30e02003a5e74faf8
Additional Information 3: d49a
Additional Information 4: 762910875005615186a3604064d40157

I tried everything I could find. I set the max memory limit to half a GB. I went to the latest versions of Apache, PHP and MySQL through the wampserver menu. I tried installing the new ‘unofficial’ wampserver release. Nothing worked and in the end I’ve simply had to go back to the official wampserver and I’ll find a different newsletter plugin.

Anyone else having this problem? Any chance anyone has a fix?