.
user takayshi
pass yourpassword
Try to make a new folder, name it as your old one and copy all your files into it.
(keep the original one as backup)
Can you change the read/write settings there?
Are you logged in as administrator? Make sure your account is set as the owner of the folder
Starting, make sure you have 4.95 or 5.01 (if non steam).
If you're using non steam version, it should be installed in c://games/toribashxxx. If it's not there, get it there.
Next to that, you can try to open the toribash folder, and run tb_login.dat with notepad. In here type: this code:user takayshi
pass yourpassword
It can cause trouble with saving replays, but it should work.