Gallery navigation

After update to 1.9.31 I can no longer jump to the gallery page that I need. This is at the top of the galleries page where there are navigation boxes eg. 1 of 49 I used to be able to put the page number I require in the first box press enter and jump to that page. Now,a pop up box appears saying ‘No images selected’ As I have a lot of galleries i need to be able to jump pages, not just one at a time. I am trying to revert to a previous version but cannot find where the downloads of previous versions are. Please help!!

https://www.ads-software.com/plugins/nextcellent-gallery-nextgen-legacy/