How to re-install an application from cloud

I was having problems with the HDR processing window - preview of image was very dark and therefore couldn't process images. I checked my images on another computer through Photoshop HDR and all worked absolutely fine - as expected, the preview very clear etc. I decided to uninstall Photoshop -  done, hoping that cloud would recognise application no longer on computer and so allow me to re-install. This does not appear to have happened - in cloud list Photoshop still ticked as installed but I no longer have the application on my computer - can you advise. Thank you