I note that the filters are downloaded as PNG files from their server only when you try to use them… they should be part of the installation not served from a server when you need them… It means initially you have to use this online to get the filters! And when any filter is enabled the memory allocation bug on zooming moderately sized images occurs.
At worst ther should be an option to download ALL the filters at one time and not download on clicking only as that will take ages if one just wants to preview the filters effects! Filters are downloaded to
C:\Users\[USERNAME]\AppData\Roaming\ThunderSoft\Watermark Remover\Filter\
no matter where you choose to install this because they obviously must have write access to save the downloaded PNG files into it so be aware if your system drive is a small SSD.