https://nsis.sourceforge.io/Download has a link “Release Notes” which leads to https://nsis.sourceforge.io/rn/v3.05 then redirects to https://sourceforge.net/projects/nsis/files/NSIS%203/3.05/RELEASE.html/view . That document is HTML but redered as text, e.g. the readers sees:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns='http://www.w3.org/1999/xhtml'> <head> <title>3.05</title> ...
Please include the fix for bug #1241 in the next NSIS release, every credible developer needs to sign the uninstaller.