Hidden meta data filename

I just finished scanning more than 1400 35mm slides using SilverFast. I had to scan them in groups of 10 - 50. For each group I had SilverFast name the files sequentially (Scan-1, Scan-2, Scan-3…). After that I renamed the files in each group using a renaming app.

Now when I open them in SilverFast to edit them, SilverFast uses the original name (Scan-1, Scan-2, Scan-3…). And when SilverFast exports the edited files it names them using the original filename. Apparently the original name is still hidden in the meta data somewhere. The Finder, Photos and Adobe Bridge only show the new name.

The software company's explanation is not real clear to me but has something to do with "reasons of not confusing names." I plan to have SilverFast process all 1400 files in 1 batch. The main problem is, many will have the same name (Scan-1, Scan-1 1, Scan-1 2, Scan-1 3,...). It will take forever to correct the names because I will have to do them one at a time searching the entire catalog to find the right image name.

My question is, is there a way to edit the meta data and change that original name (wherever it is) to the new name? Preferably using a batch process.

Thanks.