Just following up the issue reported here (and discussed and acknowledged a bit later in that thread) whereby the Video Event FX window position & size are not remembered on exit.
I am not seeing that problem in VP17 build 421, with Windows 10 Pro version 1511, Radeon HD6970, and High DPI scaling OFF.
Those who do suffer this problem (e.g. @Karsten-Semmer, @Sr_Garcia & @fifonik), what are your OS version, GPU & status of High DPI scaling?