Issues when you try to upgrade Lefthands to a new software version you get the following error.
Cannot find one or more files to download from the FTP site. This may be due to activity on the FTP site. Either wait a few minutes and click Try Download Again or try to install the files. if the Installationrequiers one of the missing files, a message will inform you that the installtion was not successful.
To remove this message go to Help > Preferences >
You may have the settings like below.
Download > automatic
File download > Download all Files
Bandwidth Speed > Fast
Upgrade selection mode > Advanced.
Click on OK and try again on clicking Continue
You can continue the installation.