We purchased a copy of ENVI 5.6.2 last year in October. Our motive is to work with a novel ocean-centric Hyperspectral data, named WISE in ENVI. We are looking to extract reflectance value from specific ROis for hyperspectral data (from an experimental sensor, so not registered on any software). I have field station data I wanna compare to our hyperspectral imagery reflectance value. We found ENVI very useful to read/write the large hyperspectral tiles and see the variation in spectral reflectance across the channels. Recently, we have been trying to subset the tiles with respect to a vector file containing point geometry, however, in ENVI 5.6.2 we are being unable to locate the tool "subset data from ROIs", but it is available when we open the ENVI classic (which is EXTREMELY show).

Is that tool still available in ENVI 5.6.2 ? Looking into online tutorial, it seems like the tool still exist but we still can't find it in the Toolbox searchbar...
Is there an extension we need to buy or something ?

P.S We tried converted our hyperspectral data (GeoTiff format; 30Go/flight line) to NetCDF format to anlyse them into SNAP ESA (GeoTiff that bit don't open, but there's a specific tool into that software to extract pixel value). That procedure is taking way too much time and our programming skills are limited, but just in case, any help is welcome!

Thank you!