Thank you,
I will ask to my software vendor to update the software
You could record an action and then use File>Automate>Batch to resize the 50 photos.
For example if you want the photos 800 px on the long side record the action using Automate>Fit Image as explained below.
1. Open one of the images into ps 7
2. Go to Window>Actions
3. Make a New Action Set by clicking on the Create New Set icon at the bottom of the actions palette
4. Make a New Action by clicking on the Create New Action icon at the bottom of the actions palette
5. Go to File>Automate>Fit Image and enter 800 in both fields and click OK
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6. Go to File>Save As to save the file in the desired file format like jpeg in my example to somewhere like your desktop
7. Press the Stop Recording button at the bottom of the actions palette.
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8. Close the image you were using
9. Go to File>Automate>Batch to use the action to resize a folder of images.
Check Suppress Color Profile Warnings and Override Action "Save As" Commands
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video on the basics of creating and recording an action in photoshop 7
Photoshop tutorial-How to create an action in photoshop - YouTube
If you google creating photoshop actions and photoshop batch, you'll find tons of pages going into much more detail than my brief example.