I want to add Long Path Tool to startup applications

For this you can use built-in Windows tool called MSCONFIG( you can open it from Run window )

a) Copy a Long Path Tool’s shortcut into the start-up folder to add a program to the MSCONFIG startup menu. Click on the “Start” menu and click on the “All Programs” list.

b) Right-click on the “Startup” folder, choose the “Open All Users” option. Alternatively, click “Explore” to open the folder for current user.

c) Navigate to the program’s location. Right-click on the program’s folder, choose “Copy Shortcut” from the context menu.

d) Right-click in the start-up folder and press “Paste Shortcut” to add the program to the MSCONFIG start-up menu.

e) Click on the “Start” button and type “msconfig” into the search box. Click on the “Microsoft System Configuration” option that appears in the list. Click on the tab labeled “Startup.” The program should appear in the list of start-up programs.

Download Long Path Tool — Version 5.1.6