Is Pluggo for Windows compatible with older versions of Max/MSP?
No. Please update to Max/MSP 4.5.4 or later. Installing Pluggo will update the externals in the shared folder. These externals may rely on functionality that is only in the latest version of Max. Pluggo 3.6.1, Mode 1.3.1, Hipno 1.1.1, Upmix 1.1.1, Pluggo Jr 3.6.1 and the Pluggo 3.6.1 runtime all require Max/MSP users to have version 4.6.3 installed to function properly. Please note that Pluggo is not supported in Max 5.