Solution for the War3patch.mpq problem (I hope I remember all steps correctly) / How to optimize Maps with Verxorians Warcraft 3 Map Optimizer 5.0 in 2019 (Tested with Wc3 Editor Version 1.31b):
1. Get a CASC-Editor (e.g. Ladik's CASC Viewer).
2. Open the storage: Warcraft III/data/data
3. Extract the folder scripts to folder A
4. Get an MPQ-Editor (like Ladik's MPQ Editor, I did it with MPQ Master)
5. Extract an older version of the War3Patch.mpq (I used a version from 21.03.2017) to folder B
6. Copy the previously extracted scripts folder into folder B, overwrite all.
7. Use an MPQ-Editor to create a new MPQ-File War3Patch.mpq with the content of folder B.
8. In Verxorians Warcraft 3 Map Optimizer select your new War3Patch.mpq + Common.j and Blizzard.j from scripts folder
9. Optimize your map. For me it only causes an Error if I eneable "Compress names". Edit: Other settings cause problems too, need to try a bit.
I hope this helps.