Should I uninstall 7.0.2 before installing 8.5?

Just got my hands on the 8.5 install. I currently have the 7.0.2 client and designer on my laptop. Since it is a major platform upgrade to 8.5, should I completely uninstall my 7.0.2 client? Also, how does the 8.5 install impact my SameTime 7.5 client?

Subject: you don’t need to uninstall existing client

just make install over it.also about ST 7.5 client - if it is separate app there is no problem with is (especially is you use basic setup for 8.5) you can logging in via embedded or standalone client.(but embedded client doesn’t require license for im)