All MaxTo features are disabled for this application.
This is usually done for applications that crash when MaxTo attempts to interact with them.
UltraMon
Ignore the UltraMon taskbar
UltraMon lets you have a taskbar on multiple monitors in Windows 7 or lower.
This shim prevents MaxTo from moving the UltraMon taskbars when they have focus.
This shim can be disabled in MaxTo if you go to Options, Compatibility, and clicking on UltraMon. You should find a toggle switch to disable it.
Note that shims should only be disabled if you have a legitimate reason to do so, and accept that disabling them may cause applications to crash.
Compatibility shims are our way of telling MaxTo that some programs react badly to being handled by some of MaxTo's functionality.
Each compatibility shim has a description text and a list of functionality that is affected. Some are small and do not result in loss of functionality, others cause MaxTo not to work at all (and the reason for the compatibility shim then is simply to prevent apps from crashing).
This list is kept up to date outside of MaxTo's release cycle, and will be updated automatically by MaxTo.