Upgrading MGE XE
should just be a case of extracting the 0.99 archive over the top of your existing version
Hrnchamd has uninstall instructions in the MGE XE readme so "Delete MGEXEgui.exe, d3d8.dll, dinput8.dll, and mge3." and then extract the MGE archive
If you want to be thorough then manually go through and manually delete:
Spoiler
d3d8.dll
dinput8.dll
MGE XE Info.txt
mge3 <------folder
MGEXEgui.exe
mwedit <------folder
MWSE.dll
SlimDX.dll
Data Files\meshes\f\terrain_bc_scum_01_dist.nif
Data Files\meshes\f\terrain_bc_scum_02_dist.nif
Data Files\meshes\f\terrain_bc_scum_03_dist.nif
Data Files\meshes\i\in_lava_1024_01_dist.nif
Data Files\meshes\i\in_lava_1024_dist.nif
Data Files\meshes\i\in_lava_256a_dist.nif
Data Files\meshes\i\in_lava_256_dist.nif
Data Files\meshes\i\in_lava_512_dist.nif
Data Files\meshes\i\in_lava_oval_dist.nif
Data Files\meshes\x\ex_longboat01.nif
Data Files\meshes\x\ex_longboat02.nif
Data Files\meshes\x\ex_mh_palace_courtyard.nif
Data Files\meshes\x\ex_mh_palace_tower.nif
Data Files\meshes\x\ex_mh_palace_tower02.nif
Data Files\meshes\x\ex_mh_palace_wall_01.nif
Data Files\meshes\x\ex_mh_palace_wall_02.nif
Data Files\meshes\x\ex_mh_pavillion_gate.nif
Data Files\meshes\x\ex_mh_pavillion_gate_02.nif
Data Files\meshes\x\ex_mh_pavillion_wall_e.nif
Data Files\meshes\x\ex_mh_pavillion_wall_w.nif
Data Files\meshes\x\ex_mh_wall_01.nif
Data Files\meshes\x\ex_mh_wall_02.nif
Data Files\meshes\x\ex_mh_wall_gate_01.nif
Data Files\meshes\x\ex_mh_wall_tower_01.nif
Data Files\shaders\CellTexBlend.fx
Data Files\shaders\XE Common.fx
Data Files\shaders\XE Depth.fx
Data Files\shaders\XE FixedFuncEmu.fx
Data Files\shaders\XE HUD.fx
Data Files\shaders\XE Main.fx
Data Files\shaders\XE Shadow Settings.fx
Data Files\shaders\XE Shadow.fx
Data Files\shaders\XE Shadowmap.fx
Data Files\shaders\XE Water.fx
Data Files\shaders\XEshaders
Data Files\shaders\XEshaders\Bloom Fine.fx
Data Files\shaders\XEshaders\Bloom Soft.fx
Data Files\shaders\XEshaders\Depth of Field.fx
Data Files\shaders\XEshaders\Eye Adaptation (HDR).fx
Data Files\shaders\XEshaders\SSAO Fast.fx
Data Files\shaders\XEshaders\SSAO HQ.fx
Data Files\shaders\XEshaders\Sunshafts.fx
Data Files\shaders\XEshaders\Underwater Effects.fx
Data Files\shaders\XEshaders\Underwater Interior Effects.fx
Data Files\textures\MGE
Data Files\textures\noise64.tga
Data Files\textures\noise8q.tga
Data Files\textures\MGE\water_NRM.dds
Data Files\textures\MGE\world_detail.dds
mge3\English.lng
mge3\MGE XE Default Statics Classifiers.ovr
mge3\MGEfuncs.dll
mge3\Polish.lng
mge3\Template.lng
mwedit\customfunctions.dat
mwedit\Gsixtension.esp
[Edit: bit slow and
don't delete the Data Files folder]
[Edit2: Crikey. Must learn to review what I post more thoroughly...]