Rebecca But cannot wait for hours everytime we want to visit the photos.
You should not. The idea is program indexes photos only once and then immediately shows you all of them once you open the application, it will only do quick scan for changes, but all images should be there right from the start.
If this is not what you experiencing, then something must be off. However, it is really hard to say what exactly, as I have no information whatsoever about your setup.
Do you store images on local drive? Can you please make a small video using your phone that shows what is happening with all the details? Then you can share in on goolge drive and send me a link to support@tonfotos.com I hope this way will be much easier for us to find a problem.