I am using Visual Site Designer (VSD). I am trying to open photo gallery(PG) and Web Form Builder(WFB) and the rest of the software options within VSD via the open buttons in the horizontal toolbar located on the right.
When I click on any button to open the corresponding CC software a sub window opens & offers only two options:

Download
or
Cancel

It does not offer any option to open. How do I use these commands to open the other software inside VSD?

I do not need to download the other CC software. I already have it and I do not want to cancel.
Yes, everything is fully updated, but I will check again to be sure.

I dont think VSD has been updated to open the new html formbuilder, i just checked and mine opens up the classic form builder i have both installed

it did however open up photogallery as i would expect, but again that is the old NON HTML gallery program, not their newer one

my question therefore which versions are you trying to access

Go to the Settings Menu > Configure Left Toolbar and update the installation path where these programs are installed to on your computer.

Try settings, configure left tool bar. That will handle most of the apps. I believe a couple of empty spaces would be a good addition as well. Developers?
I use some of the spaces for other programs, CMS insertion for one but have to change icons, trouble is it changes back with an upgrade. Great program, love it.