Update included plugin versions to match the GUI version

Release GUI v0.6.6

Update GUI_VERSION to 0.6.5 in CMakeLists.txt

Release GUI version 0.6.4

Bump GUI version to v0.6.3

Streamline MSVC redist installation process

Bump GUI version to v0.6.1

Use OS default timeout in Plugin Installer

Handle dependency return codes properly

Fix merger connection bug

Fix inconsistent file prefix when using openephys recording format (o…

…pen-ephys#477)