Found the cause and the fix. My File Explorer crashed specifically when clicking/opening ZIP archives. Event Viewer showed:
Faulting application name: explorer.exe
Faulting module name: ADFSMenu.dll, version: 4.0.1.95
Exception code: 0xc0000005
ADFSMenu.dll belongs to Adobe Drive CS4 (an old sync component from Adobe Creative Suite 4). It stays registered as a shell/context-menu extension even long after CS4 itself was supposedly removed, and it crashes Explorer's context menu handling, which shows up specifically when interacting with archives.
Fix: Settings > Apps > Installed apps, find "Adobe Drive CS4" (or "Adobe Master Suite CS4") and uninstall it. Worked immediately for me, no crashes since.
If it's not listed under Installed apps (leftover orphaned registration), use ShellExView from Nirsoft to find and disable the ADFSMenu.dll shell extension instead, then restart explorer.exe.