The name of that hotfix appears to be "hotfix_se2802_3_cumulative.zip".
However, when I try to apply it, I get:
---------------------------
SlickEdit Pro
---------------------------
Invalid hot fix version:
------------------
The selected hot fix is for SlickEdit 28.0.2.0.
You are currently running 28.0.1.0.
However, the "cumulative" implies it should apply to 28.0.1.0 as well. Regardless, I cannot find any other hotfixes, much less one for 28.0.1.0.