Ehm, took me a some years to become aware of the fact that after each update a downloaded file XYplorer_*_Install.exe is being kept in the %temp% folder (and since recently in the <xydata>\Temp - which is better, but so I spotted the whole issue, as I was syncing between the computers).
Maybe most of the people find this good and expected, but I would be happier with an option/tweak not to keep it there after update (or, maybe even better, to keep just a certain number of these files).
In my %temp% I currently see 157 such files, since 2017-06-04, accounting for almost 600 MB.

Not a big deal, but still...