Character issue

I'm trying use script to sync file.
But I found that the character "+" can not be used for username and password.
Does someone have the same issue as me ?

Below is my setting

Command:
C:\WINDOWS\winscp.exe /console /script=bts-sync.txt

Script:
open sftp://bts3:bts3+_@xxx.xxx.tw
option transfer binary
option confirm off
option exclude ".cache/;.settings/;.project;template_c/;"
synchronize remote E:\00_PHP_Projects\bts /home/bts
close
exit

Please read FAQ.

Thanks, it's all my fault to ask this question without read the FAQ clearly.