When I transfer images from Lr via plugin extras they appear too saturated in PL4. Have no presets option flagged on import. Also if I open PL4 images aappear over saturated in the library view. If I transfer back to Lr they are not over saturated. Only thing I can think of, is that upgraded the graphics card recently. There was also a problem with Windows and had to be reloaded and had to reload all my apps.
Greetings, Phil. Are the images being exported from Lr in the AdobeRGB or ProPhoto color space, and then opened in PL4 in the sRGB color space? (Check your software settings/preferences.) Is your monitor calibrated for one of these color spaces?