Most of the time this is not caused by a fault in the application, but usually due to 'out of memory' errors. Especially with larger projects.
Of course you should always check first if there is a newer version of the software, so you have the most stable version available. If there any known problems we always fix them as soon as possible!
Your computer might have plenty of physical memory, but there are other limitations you need to be aware of.
First note that WYSIWYG Web Builder is a 32 bits application, so it cannot use more than of your system's 2GB of memory (application+project+extensions+images etc).
And although this should be enough even for larger projects (hundreds of pages), it is important to keep the size of your images a small as possible. Using very large images (without resizing them first) may eat up a lot of your system's memory!
Also Windows limits the number of graphics objects (GDI handles) used by a single application. The default value is 10.000, although this may be lower depending on your system settings.
This means that if your project has more than 10.000 objects in memory (for example if you publish all your pages at the same time or opened lots of pages in the workspace), then Windows may close the application without a warning
Also keep in mind that the software itself also uses some of the GDI handles for the user interface!
Here are a few tips to prevent the software from crashing:
1) Keep the number of used objects within a reasonable limit. If your project contains thousands of objects then you probably should consider redesigning the layout (tip: use master pages).
2) Keep the size of the images used in your project as small as possible. See also:
viewtopic.php?f=10&t=1918
3) Use master pages so you do not have to use multiple instances of the same image. Put all common objects on a master page, this can greatly reduce the number of used system resources.
http://www.wysiwygwebbuilder.com/embedded_page.html
4) Publish one page or a smaller number of pages at a time. The publish windows has several options to publish specific pages only. For example: 'Publish page currently opened'.
5) Do not install and use too many extensions. Although it may be tempting to use lots of extensions in your project (because they are so cool), extensions are like separate applications. So let's say you use 100 extensions, that will be like having 100 applications running on your computer!
6) Reduce the number of pages opened in the workspace. If you open a page then Web Builder will have to load all images (and other assets) in order to display them. Web Builder will only allocate memory for the pages you have opened in the workspace.
7) You can also increase default per-process limit of GDI handles.
See this related Microsoft article:
http://msdn.microsoft.com/en-us/library ... s.85).aspx
Note that you can check the number of used GDI handles in the Windows Task Manager:
Finally we like to note that Web Builder can automatically make safety backups, so in most cases you will not lose any of your work during a crash.
Menu->Tools->Options->Miscellaneous->Auto backup