upgrade or not

[calloway]

simon..i am still using the 0.8.3 version ...happily..but my iMac had a box come up the other day stating that it did/would not support that version anymore..i still am able to use it but i do not know for how long.If i decide to upgrade ..do i have to delete the 0.8.3 version before uploading the .4 version..?.If i do upgrade ..will everything stay the same for my Lumin..?.thanks..Dave