On a Windows 7, x64 system, I use an older HP M2727 printer on my local network that is (status) monitored by the above mentioned HP ToolboxFX program (version 126.96.36.199, from 1/27/2010). This used to work perfectly with previous versions of Malwarebytes (including 3.4.5), but now is unable to monitor and communicate with the printer via this program: I can get it to work only if I disable the Web Protection component of Malwarebytes 3.5 beta. With Web Protection enabled, the HP ToolboxFX program will open, but displays a message that it is unable to communicate with the printer.
I have already tried to add every exclusion I can think of within Malwarebytes (including the entire Folder this program resides in, as well as the HPTLBXFX.exe file as an "application web process" , and the IP address of the printer on my network) but no luck there either. By the way, I do not run any other A/V programs.
I suppose my next step would be to run the new support tool in order to send off more complete information to you, right?