I am trying to install paid upgrade after first deactivating free version of plugin.
After selecting slider-wd.zip there is an error message around 10 seconds during upload/install.

"The uploaded file exceeds the upload_max_filesize directive in php.ini"

Please assist to remove blockage

I found a workaround using FTP.

1) I deleted free version 1 plugin completely
2) Unzipped version 2 slider-wd.zip on my hard drive and unloaded the complete folder by ftp to plugins folder.
3) Searched in Plugins search box for "Slider-WD" and this brings up slider-wd plugin activation message.
Latest version 2 now installed and activated properly

Hello Barry!

Thank you for posting about this problem!

Please note, that this blockage is because of the value of upload_max_filesize directive. When it is not large enough, the upload is not processed correctly. But we are glad to know the installation through FTP connection has worked on your website.

Let me know in case there's anything else I can assist you with.
Thanks! Have a good day!