Have you actually tested on an Apple Mac?

This issue doesn't just happen with momento and webassist products it happens with other extension writers products that take advantage of Dreamweavers extensibility. The fix is to delete Dreamweavers cache file and all works well then.

I rather think you are shooting the wrong person and should be addressing your concerns to Adobe - a quick search of their forums will bring up a number of postings about the cache file and extensibility issues.

For anyone who hasn't seen the fix its listed below

Delete the WinFilecache-########.dat or MacFileCache-########.dat, depending on your operating system, file from the following location:

WinXP
-DW8
--C:\Documents and Settings\<Your User Name>\Application Data\Macromedia\Dreamweaver 8\Configuration
-DWCS3
--C:\Documents and Settings\<Your User Name>\Application Data\Adobe\Dreamweaver 9\Configuration
-DWCS4
--C:\Documents and Settings\<Your User Name>\Application Data\Adobe\Dreamweaver CS4\en_US\Configuration

Win Vista
-DW8
--C:\Users\<Your User Name>\AppData\Roaming\Macromedia\Dreamweaver 8\Configuration
-DWCS3
--C:Users\<Your User Name>\AppData\Roaming\Adobe\Dreamweaver 9\Configuration
-DWCS4
--C:\Users\<Your User Name>\AppData\Roaming\Adobe\Dreamweaver CS4\en_US\Configuration


Mac OSX;
-DW8
--Hard disk: Users: <Your User Name>: Library: Application Support: Macromedia: Dreamweaver 8:Configuration
-DWCS3
--Hard disk: Users: <Your User Name>: Library: Application Support: Adobe: Dreamweaver 9: Configuration
-DWCS4
--Hard disk: Users: <Your User Name>: Library: Application Support: Adobe: Dreamweaver CS4: en_US: Configuration

(Please note that <Your User Name> Should be replaced with the User name you use to log into your computer)

regards

Jon