V8i SS 5 is very old and we have stopped providing any kind of support for the same. Please upgrade to the latest Connect edition version for continuous support.
The latest version is 22.08.00.175. You may see revision history from below link.
https://communities.bentley.com/products/ram-staad/b/analysis_and_design_blog/posts/new-release---staad-pro-connect-edition-v22-update-7-22-08-00
Looks like you are using a screen resolution 1280 X 768 or smaller. Try with a higher resolution. Also, as Abhisek suggested, upgrade to a recent version. There are several improvements in terms of new features, improvements to existing features and bug fixes that will make it worth the money you have to spend.