Installing English over Russian versions

[Mad Dog 7.62]

I finally received my English Black Shark from Amazon. I have been flying a Russian download version with the English cockpit mod. Hows the best way to switch to the english product? Uninstall the Russian version then install the english, install over the top, or ? Any issues to be aware of (other than losing my pilot logs, mods etc.?)

[Safari Ken]

I'm not sure where the pilot files are, but back them up before you uninstall the Russian version. Clean installs are always best. :)