crashes after start

[xDrAcHeNx]

it says it will start downloading new masteries but than it crashes

win10 x64

[michaellavoie]

FYI I was able to fix the bug and submitted a pull request. For now, I've published an unofficial fix on my fork, and I'll take it down once the official project is up to date: https://github.com/platywompus/lol-mastery-manager/releases/tag/2.0.2x