You can sync your Notezilla sticky notes if you have created a cloud account.
I suggest that you try the sync feature of Notezilla that will allow you to sync sticky notes with other devices and PCs. Right click on Notezilla icon and choose Sync option to create new sync account. You can also try our Android/iPhone apps that will allow you to access all your notes.
Once you do this, you will be able to access your notes even if Notezilla trial expires. You will be able to access notes via https://www.notezilla.net
Another way is to export your sticky notes to a text file. You can do this by going to File->Export from Notezilla Notes Browser on Windows.