When using this tool I had a stamp which had expired but even when I locked it in a place, and resaved. What can I do?
The tool is able to create stamps and any other resources as specified on the official description. However, if your stamp expired, simply open the application and re-created it. It's necessary you have the software installed on your computer. The software needs to be in full mode to be able to save and export your creation.
For more information access the official website: http://www.cutepdf.com/products/cutepdf/pro.asp