please answer

Although I am admin, I cannot delete previous records (demo). I also asked about this on messenger.

I am sorry that you had to face this problem kindly take the new version of plugin. 

1. Install it going to your wp-admin >> Plugins >> Add new and select from your local directory. 

2. Say replace with uploaded version. 

3. Now kindly deactivate plugin and re activate this is very important to do after update. For plugin to make capabilities. 

This would resolve all issues thanks.