Hi, I am new to this forum and new to these issues, so I really hope to get some advice here. Thanks a bunch in advance!

March 2014, I quit my job, filed for unemployment. In April I had a phone interview with the EDD, and was notified my claim was approved, and received a few weeks of payment.
Today I received a letter stating the ex-employer is appealing, and I may be notified to attend a hearing in front of a judge.
I have never been in this kind of situation, so I'm panicking...What are the chances of them winning? My ex-manager is a very intimidating person and she might come with an attorney (which sounds more intimidating to me). Should I hire a attorney?

Here is my story:

I have worked for this company for 2 years. At first I was taking phone calls (everyone started like this, so you can say it's like a training period) and was paid an hourly wage.
Later I was promoted. The employer got me necessary licenses and I started to gain commissions on top of the hourly wage. In the last 2 years the commissions doubled or tripled the hourly wage pay.

The licenses necessary to gain commissions need to be renewed by the employer every year. When it was about time to renew, I asked my manager 3 TIMES, and was always told to wait. (I documented these 3 inquiries.)
On the last day of renewing period, my manager said my licenses were being suspended. Then I was told to go back to answering phone calls. I was told this was a "promotion", and was temporary, but I did not get any raise.

Being stupid, I initially believed it (there's still ways to renew after the deadline). During the next 3 months my manager frequently met with me to point out my flaws.
And every time I had to sign a document outlining these "misconducts". I was not provided any chance to write my defense on the document. I was not provided a copy either.

I finally realized they were not going to renew my licenses, so I quit, and told my manager it's because my licenses were terminated and I was getting a huge paycut.
During the phone interview with EDD, I said the exact same thing.
The rep told me the employer claimed that I was moved to a different position because the company is going through a temporary restructure.
I told the rep, that if it was temporary, they should not terminate my licenses. In fact, some other employees who were also demoted to taking phone calls got their licenses renewed, meaning they would eventually get back to make commissions.
The EDD probably agreed with me because my claim was approved because "AVAILABLE INFORMATION SHOWS THAT THE CLAIMANT HAS GOOD CAUSE FOR LEAVING WORK."

Now my employer is appealing. I don't know what excuses they will use. I am afraid that they might use those "misconducts" against me. They are mostly lies, but it's my words against theirs.

Example 1: Manager claimed I was late to work for 30 minutes.
I might have been late for 5 minutes, not 30. But there is no way I can prove it.
Since that meeting, I took a few screen captures documenting my time, and the fact that my co-workers were late frequently. I hope this can prove that the policy was not enforced. Will this help?

Example 2: Manager claimed I was browsing the web during work.
Everyone does that. I did much less than others (one co-worker often played YouTube videos out loud, but he's also sleeping with the manager, so...).
If the employer provides the web history of ALL employees, I am confident they have no case. But I myself have no documentation. What should I do?

I'm worried because I signed those documents after each meeting, which was really stupid.
Since there were no actual proofs provided on those documents, do I still have a chance to defend myself in front of the judge?
I didn't quit because of these "misconducts". It's because my licenses were gone and I was getting a huge pay cut. Would the EDD still revoke their decision due to these "misconducts"?

And finally, is it necessary to hire an attorney to help me with the defense?

Thank you all so much!