I need to upgrade to 8 , although i am in the middle of a few projects.
Will my files still be workable once i upgrade?
you tell us - when you have upgradedā¦
Cubase 8 can open LE 5 projects. Note that the channel EQ has been improved drastically in newer versions, so if you used it things will sound different in 8 than they do in LE 5.
If needed, you can continue using LE 5 if you upgrade.