I cannot confirm there is an issue with the current trainer. I have tested all options and I was not able to crash or freeze the game with any of the current trainers options. This included the map waypoint mechanism. Any issues the poster (who your post was aimed at) has is all self contained.
I can confirm that the current version of the trainer is working without issue on Windows 7 Ultimate x64. I also cannot confirm that Steam released another update.
It might be possible that the poster may be using the old version of the trainer which carries the same name. The only way I was able to tell the two apart was by looking at the date they were modified. It is also possible that the poster may be using mods from the website I posted earlier in the week. If that is the case I would recommend you remove all mods and try to use the trainer again.
[Edited by Lordsovereignty, 7/29/2010 1:23:11 PM]
[Edited by Lordsovereignty, 7/29/2010 1:23:38 PM]