new emulation core V5

[mithrendal]

in order to prepare for a smooth transition to the upcoming version 5 core please update to the latest v4.5 version of vc64web on your devices where you still have precious saved snapshots.

v5 snapshots are incompatible with the v4 series.

The latest v4.5 version prepares for that with the ability to switch to an older core (even after you have updated to v5). It is essential to update to the latest current v4.5 for this to work.

if you see the following in the settings then you are already save 😎