Actually, I see that the installation failed the first time I tried to install it and you had to go into the site to fix it. Can you help sort this and let me know how I might be able to fix it myself in the future to save bothering support.
When you download the Thumbnail Gallery and you want to install it you must unpack the downloaded file and install doptg.zip file. ( Not install the entire downloaded zip file … only the doptg.zip file ).
If you have any questions please contact us again.