ICE Software: Combining H-alpha images of the Sun

I had some difficulties to merge images using photoshop (CS4). When reading the magazine Heelal (jaargang 67, nr11, november '22 p22) I saw an article on making mozaiks using ICE (Microsoft Image Composite Editor). According to Microsoft, the software is retired and not supported any more. I took my chance and downloaded and installed the 64bit version.  

I took my solar H-alpha images from May 22 and drag them into the ICE software. The result was mindblowing. The difference with my photoshop merge is huge as you will notice yourself. 

To download the software - see this link.