diff --git a/packaging/NSIS/Ultimaker-Cura.nsi.jinja b/packaging/NSIS/Ultimaker-Cura.nsi.jinja
index 228dba4fe4..3bef698805 100644
--- a/packaging/NSIS/Ultimaker-Cura.nsi.jinja
+++ b/packaging/NSIS/Ultimaker-Cura.nsi.jinja
@@ -144,6 +144,49 @@ SectionEnd
 
 ######################################################################
 
+Section UrlProtocol
+
+!macro APP_ASSOCIATE extension progid description commandname command
+  WriteRegStr HKCR "${extension}" "" "${description}"
+  WriteRegStr HKCR "${extension}" "URL Protocol" ""
+  WriteRegStr HKCR "${extension}\DefaultIcon" "" "${commandname},1"
+  WriteRegStr HKCR "${extension}\shell" "" "open"
+  WriteRegStr HKCR "${extension}\shell\open\command" "" '"${command}" "%1"'
+  !insertmacro APP_ASSOCIATE_SHORTCUT "${extension}" "${progid}" "${description}" "${command}"
+!macroend
+
+WriteRegStr HKCR "cura" "" "URL:cura"
+WriteRegStr HKCR "cura" "URL Protocol" ""
+WriteRegStr HKCR "cura\DefaultIcon" "" "$INSTDIR\${MAIN_APP_EXE},1"
+WriteRegStr HKCR "cura\shell" "" "open"
+WriteRegStr HKCR "cura\shell\open\command" "" '"$INSTDIR\${MAIN_APP_EXE}" "%1"'
+
+WriteRegStr HKCR "slicer" "" "URL:slicer"
+WriteRegStr HKCR "slicer" "URL Protocol" ""
+WriteRegStr HKCR "slicer\DefaultIcon" "" "$INSTDIR\${MAIN_APP_EXE},1"
+WriteRegStr HKCR "slicer\shell" "" "open"
+WriteRegStr HKCR "slicer\shell\open\command" "" '"$INSTDIR\${MAIN_APP_EXE}" "%1"'
+
+; Set the uninstall section flag for this section
+SetSectionFlags ${SECTION_UNINSTALL}
+
+; Define file associations for 'cura' protocol
+StrCpy $0 "cura"
+StrCpy $1 "URL:cura"
+StrCpy $2 "CURA Protocol"
+StrCpy $3 "$INSTDIR\${MAIN_APP_EXE},1"
+Call APP_ASSOCIATE
+
+; Define file associations for 'slicer' protocol
+StrCpy $0 "slicer"
+StrCpy $1 "URL:slicer"
+StrCpy $2 "SLICER Protocol"
+StrCpy $3 "$INSTDIR\${MAIN_APP_EXE},1"
+Call APP_ASSOCIATE
+
+SectionEnd
+######################################################################
+
 Section Uninstall
 ${INSTALL_TYPE}{% for files in mapped_out_paths.values() %}{% for file in files %}
 Delete "{{ file[1] }}"{% endfor %}{% endfor %}{% for rem_dir in rmdir_paths %}
@@ -187,23 +230,15 @@ RmDir "$SMPROGRAMS\{{ app_name }}"
 !insertmacro APP_UNASSOCIATE "stl" "Cura.model"
 !insertmacro APP_UNASSOCIATE "3mf" "Cura.project"
 
+; Unassociate file associations for 'cura' protocol
+StrCpy $0 "cura"
+Call APP_UNASSOCIATE
+
+; Unassociate file associations for 'slicer' protocol
+StrCpy $0 "slicer"
+Call APP_UNASSOCIATE
+
 DeleteRegKey ${REG_ROOT} "${REG_APP_PATH}"
 DeleteRegKey ${REG_ROOT} "${UNINSTALL_PATH}"
 SectionEnd
 
-######################################################################
-
-Section UrlProtocol
-  WriteRegStr HKCR "cura" "" "URL:cura"
-  WriteRegStr HKCR "cura" "URL Protocol" ""
-  WriteRegStr HKCR "cura\DefaultIcon" "" "$INSTDIR\${MAIN_APP_EXE},1"
-  WriteRegStr HKCR "cura\shell" "" "open"
-  WriteRegStr HKCR "cura\shell\open\command" "" '"$INSTDIR\${MAIN_APP_EXE}" "%1"'
-
-  WriteRegStr HKCR "slicer" "" "URL:slicer"
-  WriteRegStr HKCR "slicer" "URL Protocol" ""
-  WriteRegStr HKCR "slicer\DefaultIcon" "" "$INSTDIR\${MAIN_APP_EXE},1"
-  WriteRegStr HKCR "slicer\shell" "" "open"
-  WriteRegStr HKCR "slicer\shell\open\command" "" '"$INSTDIR\${MAIN_APP_EXE}" "%1"'
-
-SectionEnd
\ No newline at end of file