How do you know which release of nService you are using?

Click the "Powered by nService" link at the low left corner of any page on your nService website.

Upgrade within the same major version

1. Go to IIS manager to stop the nService4AppPool application pool.
2. Backup \Inetpub\wwwroot\nService4\ by copying it to another location.
3. Delete \Inetpub\wwwroot\nService4\ and \Windows\Microsoft.Net\Framework\2.0…\Temporary…\nService4\. If you deployed nService as a website instead of a web application under one of your sites listed in your IIS Manager, then you need to delete the \Windows\Microsoft.Net\Framework\2.0…\Temporary…\root\ folder instead. That is because IIS puts the compiled web pages of nService in one of the subfolders of the above root folder. You can find that subfolder and delete it if you don’t want to stop your entire IIS to delete the root folder.
4. Download http://www.avensoft.com/ns/nService4.zip and unzip it to \Inetpub\wwwroot\.
5. Copy the old web.config back to \Inetpub\wwwroot\nService4\.
6. Restart nService4AppPool application pool in IIS Manager.