Do i need a license for demo aspose slide

for my first aspose slide program i got this
run time error
java.io.FileNotFoundException: Aspose.Slides.lic (The system cannot find the file specified)
checked everywhere but the file is not there with the demo download which i thought it was there. so what should i do . do i need to buy or can you provide me a temporary license to do some testing .

No, you don’t need a license for Aspose.Slides demo. Just comment the lines which refer to license file. Doing so will show you evaluation watermark on generated slides, all other functionality is same in evaluation and licensed version of Aspose.Slides.