We use the software only on normal Windows PCs. The HDF files are read from the local hard drive. We do not use anything unusual. I do not exclude that the corporate IT department of our company sets some settings. But I think it is unlikely.
Since the problem occurs with all users, the suspicion so far has been rather that it has something to do with the software. For example, options set when opening data sets. Could you think of something that could cause such behavior?