Installation question
 

Before I buy the upgrade I have a couple of questions.

I am currently running many plug-ins including vBadvance CMPS. It looks like some of these plug-ins are in the software. What should be done about these plugins before installation.

Secondly* I had installed a Wiki plug-in that I am no longer using. I uninstalled the plug-in but get error messages sent to mail mailbox. These errors don't seem to affect the forums or the site. Would it be wise to completely reinstall the new software and get a fresh install? If I do that can I import the old posts* blogs and articles from the 3.8.4 Version I am currently using. No information should be lost* I hope.

And finally* some of the plug-ins that I would like to keep will they work in Version 4.0 if they are properly working in 3.4.8? In the past it didn't seem to be a big problem when I updated and I would reinstall the updates when they became available for the new version.

Thanks for your prompt reply.