An alternative to keep your text file but replace dropbox with botsync
botsync should synchronize your text file with your windows machine.
botsync (click images for larger variants)
on the windows machine, you could follow the one-time instructions from botsync's homapage:
Using BotSync with Windows
BotSync is designed for Linux/BSD/OSX servers, however, it can work
with Windows using cygwin opensshd:
1. Download and install cygwin from the link above. Enable Net -> opensshd
2. Click the cygwin desktop icon, then run:
net start sshd
mkpasswd -l -u botsync >> /etc/passwd
[enter a password]
3. Open BotSync's Config and set the hostname.
Set username to 'botsync'. Set Remote Dir to '/home/botsync'
This maps to c:\cygwin\home\botsync\ on the Windows filesystem.
To use another Windows directory, first, convert it to a cygwin
path for BotSync's Remote Dir.
Ex: D:\Media\Music\ becomes /cygdrive/d/Media/Music
4. Open TCP Port 22 in the Windows firewall, and enable port forwarding
on your router, if necessary.
5. Start BotSync!