I hope these instructions are enough. If you run into trouble, please submit a Support Request.

1. Copy desquirr.plw from \idasdk\bin\w32\plugins\ to \idapro\plugins\. This can be done with make install at the command prompt if you have adapted the installation path in the Makefile for your system.
2. Add different types of decompilation in \idapro\plugins\plugins.cfg if you like:

    Dump_instruction desquirr Ctrl+F7 4 Decompile_low_level_only desquirr Ctrl+F8 2 Decompile desquirr Ctrl+F9 0 Decompile_to_C desquirr Ctrl+F10 1