Well, you could try version 4.43, although I don't think that fixes anything major relating to crashes:
http://www.gammon.com.au/forum/?id=9659
If that doesn't work, we need to work out what is happening. Other people use Vista and it doesn't crash when they save.
Pgolds said:
Every time I try to Save World Details, MUSHClient crashes.
- Are you using any plugins? If so, please try a world with no plugins, and see if that helps. If that does help, add the plugins back in one by one to see which one is causing it.
- Are you using scripting? Try turning scripting off, and try again.
- Are there "funny" characters in the file name, or the world name? (ie. other than A-Z, spaces, that sort of thing).
- Does it actually save the details? That is, does it crash before or after writing the world file?
- Try doing a "save as" to another directory, one you can definitely write to.