v2.6.13 (to v2.6.20/v2.7.0-), (Un)Install and AVS/VS Proxy GUI

[mm0359]

Windows: XP. (win32)

3 issues when installing/uninstalling the program.

v2.6.12:
doesn't have the following issues.

v2.6.13 to v2.6.14:

1- "Install, ... Standard, ...".

1a- 2 entries are created in the Start Menu programs, which points to nonexistent files:
AVS Proxy GUI 2.6 -> avsproxy_gui.exe
VS Proxy GUI 2.6 -> vsProxy_gui_qt5.exe
I am guessing these entries should not be created when the Avisynth_VapourSynth option is not checked.

2- Uninstall.

2a- "AVS Proxy GUI 2.6" is removed,
but VS Proxy GUI 2.6 is leftover (even after reboot).
I am guessing something is missing in the installer/uninstaller script.

2b- Uninstaller asks to reboot Windows.
Not sure why, or whether it is related to 2a.
Will need more analysis, if not fixed along the other issue(s).

[mm0359]

avidemux_2.6.20_win32.exe

Bugs still there.

[mm0359]

win32/avidemux_2.7.0_r170529_win32.exe

Bugs still there.

[AQUAR]

These 2 programs are just complimentary programs to avidemux.
Ideally they should be included in the uninstall process and probably are in the release versions.