updating does nothing

### Step 1: Please describe your environment

* ZeroNet version: _.6.3____
* Operating system: ___windows 10 home version 1809 OS Build 17763.503_
* Web browser: _tor browser 8.0.9____
* Tor status: available
* Opened port: yes
* Special configuration: ____

### Step 2: Describe the problem:
updating does nothing
#### Steps to reproduce:

1. ___update__
2. _____shut down program after waiting 2 minutes and start it up again
3. _____

#### Observed Results:

* What happened? This could be a screenshot, a description, log output (you can send log/debug.log file to hello@zeronet.io if necessary), etc.

#### Expected Results:

* What did you expect to happen?

首先，在 Windows 10 Home 1809 上使用 Tor Browser 8.0.9 复现 ZeroNet 0.6.3 的更新流程，采用报告中所述的两分钟等待和重启。收集 issue 中提到的 debug.log，并将观察到的行为与预期的更新结果进行比较；报告未说明该结果。

由索引模型根据 Issue 内容生成。