Is there a way to import an application exported from Appian 6.6.1and import in

I have gone to the discussion, hit add attachment, selected Default Community, Appian KC, Discussion Topic Attachements, Eduardo Fuentes, selected Upload Document, browsed to the file, gave it a description, selected create, It indicated that it worked but I can not find the file to select it an add as an attachment. The file is named import_failure_log.zip. I don't know what I'm doing wrong but it is not being loaded.

I have gone to the discussion, hit add attachment, selected Default Community, Appian KC, Discussion Topic Attachements, Eduardo Fuentes, selected Upload Document, browsed to the file, gave it a description, selected create, It indicated that it worked but I can not find the file to select it an add as an attachment. The file is named import_failure_log.zip. I don't know what I'm doing wrong but it is not being loaded.