Okay guys, seriusly I need to solve the issue, I already did all that you say to me but it’s not working. In fact you tell me “delete the older version” (that includes the wpdm-premium-packages folder and the download-manager folder ) and I do it but when I install the new version, it only installs the download-manager folder, I going to check the ZIP file that I dowload from the purchase page as you tell me and It doesn’t have the wpdm-premium-packages folder so How do you expect me to update to the new version of the premium package if you ask me to delete the previous one and then the update package does not bring it.
P.S.
fortunately I made backup files of the plugins and I could reinstall the previous versions correctly but still I need to solve the problem with the 2checkout plugin update.