Knime Analytics, Version 5.3.2

Hello Community,

I worked on my workflow and had it finished and then I saved. No negative response. I changed from Modern Design to Classic Design and then my workflow got lost. On classic and modern design. The workflow cannot be found on recent workflows (I mean the last version I saved). I have no error entry in Knime. What can I do to recover it? Is there any automated way to do a backup?