First time user. Successfully installed and downloaded my store data as it suggested. I opened in excel and added about 5 new products and deleted everything else. I successfully uploaded the .txt file into zen cart.

Question though. In the readme.txt file it says,

"Any fields left blank (NULL) will not always retain the current data in your store. Best to delete unneeded columns, and use original store data as updates template"

I am only adding entries to about 12 columns out of the 24. The other entries for the other 12 columns are blank. Does this mean that I should be completing deleting those columns in the tab delimited file?

When I did my test upload, I failed to delete blank columns do this but, I don't see anything unusual that makes me think I screwed something up.